Bolt Carrier Groups
Discover top-quality H&K bolt carrier groups at HKParts, including the HK MP5 bolt carrier, G3 bolt carrier, and HK93 bolt carrier. Explore our selection of full auto bolt carriers, enhanced bolt carriers, and tungsten-filled bolt carriers for models like the HK416, HK91, and HK MR556. Ensure reliability with factory HK bolt carriers and US-made bolt carriers. Shop now for chrome-lined bolt carriers, firing pin assemblies, and complete bolt heads to maintain 922r compliance and superior performance.
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H&K G36/SL8 (5.56/.223) Bolt Catch Spring
H&K Heckler & Koch
$9.95HK German G36 & SL8 Bolt Catch SpringHKP-01861$9.95 -
H&K G36/SL8 (5.56/.223) Bolt Heads Ejector
H&K Heckler & Koch
$19.95HK G36/SL8 HK German Bolt Head EjectorHKP-01868$19.95 -
H&K MP5 40/10 High Impulse Locking Piece #25
H&K Heckler & Koch
$229.95New HK German MP5 40 or MP5 10mm High Impulse Locking Piece Marked #25 This is the 60-degree locking piece that is used for high-impulse ammo, commonly found in +P or +P+ ammo. This locking piece is needed to cycle these hot loads without excessive...HKP-00437$229.95 -
Out Of Stock
HKP HK 91/G3 (7.62x51/.308) Complete Semi Bolt Group
HKP HK Parts
$339.95US Made HK 91/G3 Semi-Auto Bolt Group Complete - New Each bolt group is built using HK factory prints and specs here in the US. As a bonus, each bolt group counts as two US parts for US 922r compliance. Everything you need as a spare or a direct...HKP-01473$339.95 -
H&K MP5 40/10 -2 Roller
H&K Heckler & Koch
$19.95HK German MP5 40/10 -2 roller Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for...HKP-00336$19.95 -
H&K SP5K 9mm Semi Auto Bolt Carrier
H&K Heckler & Koch
$369.95HK German SP5K Semi Auto Bolt Carrier New HK SP5K bolt carrier complete. Made in Germany. Compatible With: SP5K Will also work as a semi auto only carrier in all MP5K semi buildsHKP-18207$369.95 -
H&K UMP (.40 S&W/.45 ACP/9mm) Firing Pin Retainer Pin
H&K Heckler & Koch
$7.95HK UMP Firing Pin - Retainter Pin This is the pin that trips the trip lever on the UMP lower. Compatible With: HK UMPHKP-01894$7.95 -
HK MR556/416 Firing Pin Catch
H&K Heckler & Koch
$19.95HK MR556/416 Firing Pin Catch Compatible With: HK MR556/416HKP-16846$19.95 -
Out Of Stock
HK UMP (.45 ACP) Bolt Group
$369.95HK UMP .45 Tungsten Filled Semi Auto Bolt Group Complete. The semi auto bolt group is required for HK USC to HK UMP caliber conversions. Comes complete less the recoil assembly. Specifications: Tungsten filled Heat treated ParkerizedHKP-18751$369.95 -
HKP HK 93/53/33 (5.56/.223) Firing Pin - Titanium
HKP HK Parts
$49.95HK93, 33, 53 Firing Pin - Titanium A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK 93, HK33 & HK53 weapon system. Get the lightest, strongest firing pin available for your HK firearm. Ideal for...HKP-17769$49.95 -
PTR-32 (7.62x39) Locking Piece - 65 degree
PTR
$67.95PTR-32 (7.62x39) Locking Piece - 65 degree New PTR Locking Piece For PTR-32. Marked "32" for the PTR-32 series of rifles and pistols. This is a 65 degree locking piece. New PTR manufacture. This locking peice will also work for custom HK builds as well.HKP-18520$67.95 -
RCM HK 93/53/33 # 8 Locking Piece 53 Degree
RCM
$49.95RCM HK 93/53/33 # 8 Locking Piece 53 Degree New 53 Degree #8 Locking Piece for the HK 93, 33, C93 & V93 rifles. Made in the USA from ordnance grade steel, heat treated and made to last. A pefect upgrade for your well used or questionable C93 or C93P...HKP-16555$49.95 -
RCM HK 99/33/33K Full Auto Bolt Carrier US - Black
RCM
$359.95HK 93, 33 & 33K Full Auto Bolt Carrier - US - RCM Brand new US RCM manufactured new style HK33/93, 33K factory bolt carrier. The finest HK bolt carrier ever made with the latest & greatest German inspired improvements and updates. Ideal for...HKP-20537$359.95 -
FMP HK 21 (7.62x51/.308) Bolt Carrier - HK Contract w/ FMP
FMP
$549.95HK21 HK Factory FMP Stripped Bolt Carrier New factory surplus.HKP-00566$549.95 -
H&K HK G36 & SL8 Firing Pin - All Variants - Black
H&K Heckler & Koch
$51.95HK German G36/SL8 Firing Pin This is a great spare to have on hand. The firing pin fits all G36, G36K, G36C & SL8 variants. Compatible With: HK G36/G36K/G36C HK SL8HKP-00289$51.95 -
H&K HK MR762 Firing Pin
HKP HK Parts
$29.95H&K HK MR762 Firing Pin Specifications: Made in the USA Compatible With: HK MR762HKP-17795$29.95 -
H&K HK MR762/417/G28 Firing Pin
H&K Heckler & Koch
$64.95Firing Pin MR762 & HK 417 Firearm - German HK A must have wear and replacement item for your MR762 or HK 417 Firearm. Compatible With: MR762 HK 417 G28HKP-16613$64.95 -
Out Of Stock
H&K HK21 (7.62x51/.308) Locking Piece
H&K Heckler & Koch
$149.95H&K HK21 (7.62x51/.308) Locking Piece - New Factory, Old Stock The HK21 standard 50-degree locking piece. Each LP includes the hardness "dot" to identify them as HK 21 locking pieces.HKP-01745$149.95 -
H&K UMP (.40 S&W/.45 ACP/9mm) Lower Bolt Carrier Guide
H&K Heckler & Koch
$12.95HK German All Steel UMP Carrier Guide This is the steel piece the guides the UMP bolt carrier. Compatible With: All HK UMP lowersHKP-16500$12.95 -
PTR HK 91/G3 (7.62x51/.308) Full Auto Bolt Carrier - Tungsten Filled
PTR
$299.95US-Made F/A G3, 91, and PTR-91 Bolt Carrier - Full Auto Carrier - Tungsten Filled PTR uses the exact Heckler & Koch specs and the same steel to manufacture their carriers. PTR uses HK factory blueprints for manufacturing & quality control. This...HKP-01777$299.95 -
PTR HK 93/53/33 # 7 Locking Piece 55 Degree
PTR
$49.95PTR HK 93/53/33 # 7 Locking Piece 55 Degree New US Made 55 Degree #7 Locking Piece For the HK 93, 33, C93 & V93 Rifles. Made in the USA from ordnance grade steel, heat treated and made to last. A perfect upgrade for your well used or questionable...hkp-18470$49.95 -
RCM HK 93/53/33 # 7 Locking Piece 55 Degree
RCM
$49.95RCM HK 93/53/33 # 7 Locking Piece 55 Degree New 55 Degree #7 Locking Piece for the HK 93, 33, C93 & V93 rifles. Made in the USA from ordnance grade steel, heat treated and made to last. A perfect upgrade for your well used or questionable locking...HKP-16556$49.95 -
RCM MP5 40/10 Low Impulse Locking Piece #24
RCM
$44.95RCM MP5 40/10 Low Impulse Locking Piece #24 Made out of enhanced material and heat treated to spec. The # 24 is the 90-degree locking piece. This is also the standard non-high impulse ammo locking piece. Compatible With: MP5...HKP-15148$44.95 -
B&T TP9/MP9 Extractor Spring
B&T Brugger & Thomet
$9.95B&T TP9/MP9 Extractor Spring Swiss B&T manufactured TP9 & MP9 extractor spring. A must have spare part! Compatible With: TP9 MP9HKP-17300$9.95 -
H&K 23E/13E/G43 (7.62x51/.308) & (5.56/.223) Extractor
H&K Heckler & Koch
$119.95HK23E & HK13E Extractor New HK German and no longer in production. Compatible With: MM 23E HK 13EHKP-00818$119.95 -
H&K G36/SL8 (5.56/.223) Bolt Group Fork
H&K Heckler & Koch
$12.95HK G36 & SL8 Bolt Group Fork For Cocking HandleHKP-01859$12.95 -
H&K G36/SL8 (5.56/.223) Firing Pin Retaining Pin
H&K Heckler & Koch
$10.95H&K G36/SL8 (5.56/.223) Firing Pin Retaining Pin Compatible With: HK G36 HK SL8HKP-02469$10.95 -
H&K MP5 40/10 -4 Roller
H&K Heckler & Koch
$19.95HK German MP5 40/10 -4 roller Hard to find and essential for making headspace adjustments when necessary. Great spare to have on hand and no longer in production. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for...HKP-00337$19.95 -
HKP HK 23E/13E (7.62x51/.308) & (5.56/.223) Firing Pin - Titanium
HKP HK Parts
$49.95HK23E, MM23E, 13E Firing Pin - Titanium Grade 6 weapons grade titanium manufacture. Made in the USA. A must have upgrade to have on hand as the firing pin is one of the most abused components in the HK weapon system. Get the lightest, strongest firing...HKP-17770$49.95 -
HKP HK MP5 9mm Bolt Carrier - Red
HKP HK Parts
$189.95Bolt Carrier F/A - 9mm - HK Red - MP5 Machined completely from billet ordnance steel. This carrier is made to the latest specs and is Tungsten filled, and heat-treated providing the finest American made carrier available. This carrier has been...HKP-19535$189.95 -
H&K UMP/USC (.40 S&W/.45 ACP/9mm) Bolt Catch
H&K Heckler & Koch
$36.95HK UMP & USC Bolt Catch New HK German lower. Compatible With: HK UMP HK USCHKP-01897$36.95 -
HK G36/SL8 (5.56/.223) Bolt Heads Ejector
$13.95HK G36/SL8 Ejector For All G36, SL8 bolts -US MadeHKP-18371$13.95 -
HKP PTR HK91 / PTR-91 Bolt Head Complete
HKP HK Parts
$179.95HKP PTR HK91 / PTR-91 Bolt Head Complete New PTR bolt head complete with extractor, extractor spring, roller retainer plate, pair of 8mm rollers. Ready to drop in to replace your worn out bolt head. Bolt head counts as 1 US made compliance part for the...HKP-20140$179.95 -
Out Of Stock
MM HK UMP 9mm Conversion Kit - 16 inch Barrel
Michaels Machines
$889.95HK UMP 9mm Conversion Kit - US-Made UMP/USC conversion kit will convert existing USC-UMP conversions to 9mm. This is a simple drop-in conversion for those who have already done the USC-UMP conversion. The conversion parts are drop-in, with the...HKP-02284$889.95 -
B&T TP9/MP9 Firing Pin - Black
B&T Brugger & Thomet
$44.95B&T Firing Pin For B&T TP9, MP9 B&T MP9, TP9 firing pin. Original Swiss made Brugger and Thomet production in new condition. Compatible With: TP9 MP9HKP-17297$44.95 -
HKP HK MP5 (.40 S&W) Locking Roller +6
HKP HK Parts
$11.95HK US MP540 Locking Roller, +6 The proper roller size is essential for proper headspacing of bolt gap. Please Note: The price listed is per roller. Order 2 (pair) for a complete set for the bolt head. An easy way to remember the size you need to...HKP-17565$11.95 -
PTR HK 91/G3 (7.62x51/.308) Semi-Auto Bolt Carrier
PTR
$249.95New US Made HK91, HK G3, PTR-91 Bolt Carrier - Semi Auto Carrier This part is made to exact H&K specs and with the same material. PTR uses HK factory blueprints for manufacturing and quality control. Manufactured at the PTR facility here in the...HKP-01461$249.95 -
H&K 93/53/33 (5.56/.223) Firing Pin
H&K Heckler & Koch
$69.95H&K 93, 53, & 33 (5.56/.223) Firing Pin This is the factory-correct HK German firing pin and is a great replacement part. This is also a great upgrade for your HK 223.556 clones. This part is no longer available from HK as this part is out of...HKP-00192$69.95 -
H&K HK MR762 Bolt Group Complete DMR
H&K Heckler & Koch
$899.95H&K HK MR762 Bolt Group Complete DMRHKP-16627$899.95 -
Out Of Stock
HKP HK MR556/416 SS Firing Pin
HKP HK Parts
$29.95Firing Pin For HK 416 & MR556 Firearm - USA Made from hardened stainless steel and comes new in the white. Compatible With: HK416 HK MR556 HK CR556 HK M27HKP-01756$29.95