Government, Military, and Law Enforcement: Please contact SEI directly through official channels for pricing quotations and availability. We will also honestly and objectively advise you on what best meets your mission requirements. Likewise, we are especially keen on user feed back and are always open to new ideas on product improvements and new product development – especially from the shooter perspective.
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M14 parts & accessories
(Click image to enlarge) |
Part # |
Fits |
Name |
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Price |

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2069 |
M14 |
M14/M1A Survival Parts Kit
This is THE essential spare parts kit that every M14/M1A owner should carry with them. Includes a trigger group parts kit (including a safety spring), a connector lock, an ejector head, an extractor, and a shim kit. These parts are all manufactured in-house by us, and the trigger pin, hammer pin, connector lock and ejector head are all M80HT heat treated, giving it superior durability and corrosion resistance, as well as a 60RC hardness.
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$70.00
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2072 |
M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |
SEI “WARFIGHTER” Gas System
After popular request, we have decided to offer our superior gas system to the market as a package deal. The “Warfighter” gas system will include our M80HT Gas Cylinder, our SBR Hard Chrome Piston, and our M80HT Standard Gas Plug. These parts are the same ones that come standard on the CrazyHorse rifles, and have been combat proven by 2ID, 10th MTN, 4th ID, 101st ABN as well as many others. Rest assured that if you are looking for the best possible upgrades to your gas system, you needn’t look further.
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$215.00
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M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |
SEI Barreled Action
Smith Enterprise is proud to offer in limited quantity, completely barreled and headspaced actions for the Smith Enterprise Crazy Horse rifle. Upon receipt of a valid FFL, the customer will receive a Smith Enterprise receiver barreled with a Smith Enterprise barrel (contour of their choice), and a stripped USGI bolt that has been properly headspaced to the barrel. The barrel will be M80HT finished and stamped with a matching serial number to the receiver.

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$1705.00 |

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M14 |
SEI M14 Barstock Receiver
Smith Enterprise Inc. is proud to offer our superior Smith M14 receiver, machined from a solid block of 8620 barstock. We have been manufacturing M14 receivers since 1984 and are the leader in the M14 billet manufacturing arena. Machined to exacting USGI tolerances as per the original prints, Smith Receivers undergo a stringent heat-treating process that culminates in a proprietary cryogenic treatment process, allowing the receiver to have uniform molecular structure in the crystals of the material, resulting in superior strength and hardness. Each receiver undergoes a meticulous hand-deburr/finish which results in an heirloom-quality receiver that is built not only for the rigors of combat, but also to be passed down through generations. The final stage of production is a mil-spec black parkerized finish.
These receivers are in short supply, and are temporarily discontinued while we shift our focus to manufacturing the parts to support the receiver for builds (Op Rod, Trigger Group, Bolt, etc…), it would behoove you to take advantage of this offering while they are still available.

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PLEASE NOTE:
Regarding SEI barrel purchases
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SEI barrels are short chambered! SEI recommends that you send your rifle to us here for barrel installation – all our M14 barrels are short chambered, and require fitting to the receiver. We use a special-made Manson M118LR reamer, that allows accurate headspace for M118LR 175 gr. through M80 ball ammo.
Please also note that these barrels are provided “in the white” to our customers. If you request M80HT heat treating, the barrel must be headspaced by us prior to heat treatment.
SEI barrels are not hard chromed in the bore!
SEI will also parkerize your barrel for no extra charge. When you purchase online, please be sure to make this request in the comments box at the bottom of the online order form.

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2025
9345-M14SE |
M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |
Medium Heavy 22” Barrel, M21A5-C-IED
Chrome-moly, unlined, 1:10 ROT. Installation cost will vary, due to relative difficulties associated with various commercially manufactured receivers. Customer to specify chambering (e.g M118LR, M852). Will shoot accurately with M80 Ball Ammo. M80HT heat treat is available at additional cost.
• DOWNLOAD SPECIFICATIONS
Approved by TACOM-RI for U.S. Army Reserve Shooting Team.
NOTE: see note above about installation, headspacing, and heat treatment. Click here.
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$340.00
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2026 |
M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |
Medium Heavy 18” Barrel, M21A5-C-IED
NOTE: see note above about installation, headspacing, and heat treatment.
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$340.00
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2028 |
M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |
Standard 22” Barrel
1:10” twist, 4 grooves. Made from 4140 chrome-moly and stress relived, with MIL-STD 171 magnesium phosphate finish.
NOTE: see note above about installation, headspacing, and heat treatment. Click here.
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$340.00
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2027 |
M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |

950 yard proof these barrels work... click here
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Standard Weight 18” Barrel, M14 DMR
1:10” twist, 4 grooves. Made from 4140 chrome-moly and stress relived, with MIL-STD 171 magnesium phosphate finish.
This is a great replacement for Scout rifles, a Scout-type gun build, or MK14 Navy, M39EMR/USMC weapon. Very accurate out to 900+ yards with good grade of ammo such as M118LR or U.S.N. MK316 ammo.
The SEI P/N 2013 GLFS-D-18 gas lock, made from fatigue proof steel, has the correct deck height that allows the use of a standard USGI front sight, or one of our bar stock sights (shown below): P/N 2055 USGI replacement, P/N 2004 National Match with .062” blade, P/N 2018 Tritium Bar Stripe, or P/N2019 Tritium Dot.
NOTE: see note above about installation, headspacing, and heat treatment. Click here.
| $340.00
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2022 |
M14
SOCOM 16/II
ALSO FITS NORINCO/ POLYTECH RECEIVERS
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M14 SOCOM CQB Barrel, 16”
Replaces Springfield SOCOM 16 and SOCOM II, or can be used for new builds on any M14 type receiver.
1:10” twist, 4 grooves. Made from 4140 chrome-moly and stress relived, with MIL-STD 171 magnesium phosphate finish. Barrel is crowned at muzzle, concentric to bore and of the proper depth. Chambers (when we install them) are a 16+ finish.
Our barrels will shoot 1 MOA with M118LR or any of the 168 gr. factory match ammo. USGI LC M80 ball or any of the U.S. made M80 ball (with the exception of Portuguese 147grn. from the 1980’s) will shoot under 2 MOA most of the time.
We recommend that you use the P/N 2001V SOCOM Kit, The SEI gas lock, made from fatigue proof steel, has the correct deck height that allows the use of a standard USGI front sight, or one of our bar stock sights (shown below): P/N 2055 USGI replacement, P/N 2018 Tritium Bar Stripe, P/N2019 Tritium Dot, or P/N 2004 National Match. We also recommend replacement of the standard rear sight with P/N 2020, that uses a smaller aperture for better accuracy.
Featured in the Shooting Illustrated Jan. 2012 issue, written by Gary P. Johnson.
NOTE: see note above about installation, headspacing, and heat treatment. Click here.
| $340.00
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2012 |
M14 |
Gas Lock Front Sight - Hooded (GLFS-H) (US Army)
Features height-adjustable .062” dia. front sight pin, used on SEI’s Crazy Horse, 2ID, USN, and USMC versions.
Chrome-moly, highly advanced metallurgical process. Double heat treated, as well as M80HT, corrosion resistant 60 HRC surface. For 18" & 22.0" barrel lengths (i.e. M14SE).
• DOWNLOAD SPECIFICATIONS |
$90.00
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2013 |
M14 |
GLFS-D-18 (Dovetail) (USN & USAF)
Deck height allows use of GI or match front sight. Chrome-moly, highly advanced metallurgical process. Double heat treated, as well as M80HT, corrosion resistant 60 HRC surface. For 18.0" barrel (i.e. MK14 SEI).
• DOWNLOAD SPECIFICATIONS
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$90.00
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2011 |
M14 |
GLFS-D-22 Dovetail
Deck height allows use of GI or match front sight. Chrome-moly, highly advanced metallurgical process. Double heat treated, as well as M80HT, corrosion resistant 60 HRC surface. Designed for 22.0" barrels.
• DOWNLOAD SPECIFICATIONS
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$90.00
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2071 |
M14 ALSO FITS NORINCO/ POLYTECH RECEIVERS |
SEI M14 Gas Cylinder, NSN 1005-00-790-8766
New production made to exact USGI specifications. Forged, fully machined and heat-treated 416 stainless steel. Double heat-treated to include M80HT 60 HRC on surface. Will not corrode. To finish, this part is cryogenically treated. As used on our military contracted rifle builds. Spindle valve and spring sold separately.
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$110.00
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2030 |
M14 |
Shim Kit Set, Gas Cylinder
This shim set includes 4 different thickness shims to properly shim your gas cylinder to your barrel. Includes .005, .008, .010 and .015 shims.
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$20.00
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2001-GL |
M14 SOCOM 16 |
SEI Socom 16 Gas Lock
5/8”x24 with .735” length of thread, made from 1144 fatigue proof steel bar stock. Height of the gas lock dovetail deck allows the use of a standard USGI front sight, SEI NM front sight, or Tritium systems (sights not included). Use of Gas Lock Wrench P/N 2017 is recommended with this kit.
WARNING – Will not work with factory SOCOM or SOCOM II XS Style Front sights, they sit egregiously high and will have you shooting extremely low past the point of adjustment.
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$80.00
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2001-GL-NYC |
M14 SOCOM 16 |
SEI Compliant Gas Lock
For customers with a Springfield Armory SOCOM 16 rifle who live in areas where muzzle threads, flash hiders, or even muzzle brakes are prohibited, this part may be compliant if intstalled per the law.
This part features a standard front sight deck height that allows the use of Standard GI Sight (P/N 2055), NM Front Sight (P/N 2004), Tritium Combat Bar Sight (P/N 2018), or the Tritium Combat Dot Sight (P/N 2019).
The SOCOM 16 factory muzzle brake is a one-piece casting that features a lower deck height than a standard M14/M1A. In order to compensate, sight that is sold on the SOCOM 16 is taller and wider, and the aperture is also wider, than the regular M14 version. The blade on the factory SOCOM XS sight is .135" and the rear aperture is .130”, compared to a front sight width of .075” and an aperture of .065” on a standard size.
Solid bar stock 1144 Fatigue-Proof steel with mil spec magnesium phosphate finish. Use of XF-7 Grease (pn #1019) on the muzzle threads during installation is recommended. Threaded 5/8x24 .735.
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$80.00
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2017 |
M14 |
Gas Lock Front Sight Wrench
New issue GLFS Wrench for M14SE SDM, MK14 Mod O rifle, and Crazy Horse/M21A5. Piston not included.
• DOWNLOAD SPECIFICATIONS
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$45.00
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2002 |
M14 |
M14 Adaptor, Castle Nut Type
Machined from fatigue proof steel bar stock. Includes wire EDM internal male splines and rectangular hole for the castle nut. Threaded 5/8"x24, with .735" length of thread, a common size that fits most other accessories.
The dove tail deck will fit any USGI type front sight, including:
P/N 2055 SEI/USGI standard front sight
P/N 2004 NM .062
P/N 2018 Tritium Bar Stripe
P/N 2019 Tritium Dot
If you are using this with an 18 inch barrel:
18" barrels will shoot higher than 22" barrels. To compensate, SEI recommends P/N 2012 GLFS-D-18, or P/N 2013 GLFS-D-18 Gas Lock that is at the correct height, mated to a standard front sight such as the ones mentioned above. Springfield Armory uses a taller front sight like the Springfield Scout.
Please note: SEI parts, particularly those that are manufactured from solid bar stock, are produced in batches, so customers my experience some delays in availability.
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$90.00
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2000A |
M14 |
M14 22” and 18” Muzzle Adaptor
.595-32 ID thread, 5/8x24 OD thread. Made from 8620 bar stock.
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$90.00
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2002-NY |
M14 |
M14 Adaptor, Castle Nut Type, New York Compliant
Machined from fatigue proof steel bar stock. Includes wire EDM internal male splines and rectangular hole for the castle nut. Threads have been machined off to comply with compliant state regulations regarding “No flash suppressor, no muzzle brake”. Castle nut must be TIG welded to the adapter to make it a permanent device.
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$90.00
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2018 |
M14 |
M14 Tritium Bar Combat Sight
Designed for use in close combat during limited visibility with MK14-type weapons. Not for use in high precision engagements. Genuine Trijicon self luminous vial in 4140 Chrome Moly Wire EDM front sight unit.
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$80.00
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2055 |
M14 |
M14 Standard Front Sight
Standard USGI front sight replacement for the M14/M1A type rifles. Made from 4140 chrome-moly steel, wire EDM process. Overall height .570” +.005. Blade has sharp corners for clear sight picture. MIL-STD 171 phosphate finish. Includes 6-40 screw.
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$40.00
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2004 |
M14 |
M14 National Match Front Sight
Heat-treated, 4130 chrome moly front sights make it fast and easy to upgrade your original military sights for improved strength and accuracy. Parkerized finish reduces glare and helps deflect light for a clear, easy-to-acquire sight picture in all light conditions. Match front sights feature a narrow, .062" wide front blade for a crisp, clean sight picture at all normal competition ranges.
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$40.00
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2010 |
M14 |
M14 /M1A Standard Bolt Stop
Manufactured by SEI to USGI specifications. Heat treated, carburized 8620 steel. Black phosphated.
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$30.00
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2003 |
M14 |
SEI M14/M1A Extended Bolt Stop/Release (NSN Pending)
Now, machined from bar stock and case hardened. Limited civilian availability. A must for high stress or cold weather applications. Standard issue on USN & USAF MK14's and US Army M14SE's.
Current design does not allow the bolt to close with an empty magazine inserted (but it can be closed if the magazine follower is pressed down).
CAUTION – the extended bolt stop/release is designed to make access and manipulation of the bolt much easier and faster. Therefore, DO NOT REST THE WEAPON ON ITS SIDE OR LEAVE IT UNATTENDED if the bolt is locked back and a loaded magazine is in the receiver. ALWAYS KEEP THE SAFETY ENGAGED.
• DOWNLOAD SPECIFICATIONS
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$55.00
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2029 |
M14 |
M14 Connector Lock Pin
Replaces worn out USGI units for positive magazine engagement. Made from special SEI tool steel, case hardened to 58 HRC. Standard component found on M21A5/M14SE Crazy Horse. |
$17.00
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2075-SBR |
M14 |
M14 Gas Piston
The SBR (Smith Battle Rifle) Gas Piston has been developed for the demands of 21st century warfare, and is superior to the issue versions.
Made from 440c cutlery grade stainless steel and stress relieved. OD grooves are fully radiused on the bottom (instead of square) to enhance cleaning and carbon removal. After heat treatment and through hardening to 58 HRc Rockwell, the pieces are ground to final dimensions, with a glass-like surface finish of 9 on the Profolomater, machined to tolerances of +/- .0005” (1/2 of 1000th of an inch). Final finishing includes surface hard chrome plating to .0005” depth, and heat treatment to our SOP to prevent chrome cracking and hydrogen embrittlement.
Developed for war fighters with the M14,EBR,EMR, etc., made to resist corrosion and excessive wear, the corners stay sharp where needed to minimize gas blow-by. When used with our M80HT gas cylinder, wear is kept to a minimum, and can withstand infrequent maintenance in the field. Accuracy will not be diminished and may improve as long as the barrel is in good condition.
• DOWNLOAD SPECIFICATIONS
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$70.00
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2076 |
M14 |
M14/M21 A5 C-IED Gas plug (Longer)
New manufacture by SEI. 420 Stainless, double heat-treated to include M80HT 60 HRC on surface and cryogenically treated. Will not corrode. As used on our military contracted rifle builds. |
$50.00
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2079 |
M14 |
Socom 16 Gas Plug (Shorter)
Shorter plug design, has more volume for gas. Also recommended for use with sound suppressors. 17-4 Stainless, double heat-treated – 45 HRC, then M80HT 60 HRC. |
$50.00
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2074 |
M14 |
Recoil Spring for Op-Rod
Silicon Chrome Steel |
$35.00
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2088 |
M14 |
M14/M21A5 C-IED 4.5 lb Mid-range Trigger Upgrade
Note: this is work is performed only on a trigger assembly that is supplied by the customer.
Includes SEI S-7 trigger and hammer axis pins with silicone-chrome hammer spring and re-parkerization. All parts deburred and smoothed as needed.
SEI can also replace your commercial safety and plunger housing with USGI parts for an additional $40.00. Please state this when ordering.
• DOWNLOAD SPECIFICATIONS |
$130.00
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2089 |
M14 |
MK14 Mod 0 Bolt Engraving
We are now offering custom MK14 Mod 0 with the US Navy Anchor on any customer-supplied M14/M1A bolt. This is perfect for those of you who are trying to complete their MK14 Mod 0 clone but cannot find an original bolt. Turnaround is ~2 weeks. |
$155.00
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M14 |
USGI Front Bands
NOS USGI Front Bands, Comes As Is, No Returns/Refunds. |
$17.00 |

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M14 |
USGI Trigger Plunger Housings
NOS USGI Plunger Housings, Comes As Is, No Returns/Refunds. |
$15.00 |

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M14 M1 Garand |
USGI Safety
NOS USGI Safety. SA or ROBER-HT markings. Comes As Is, No Returns/Refunds. |
$40.00 |

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2063 |
M14 |
M14/M1A Safety Spring, USGI
This is a USGI Safety Spring to replace your worn or broken spring in your M14/M1A. |
$12.00
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2064 |
M14 |
M14/M1A Bolt Ejector Head
This is a new-manufactured part to exact USGI print. This will replace your worn or broken ejector head on your M14/M1A bolt. |
$12.00
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