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RCM HK STYLE MP5 .40, 9/16-24 THREAD

MP5 .40 Cal 3-Lug & Threaded – 9/16-24
NEW RCM CHF MP5 .40 BARREL. MP5 .40. This is the finest US made barrel available. Material is CHF 41v40. Machined to the highest standards. Correct Chamber Flutes unlike other U.S. made barrels that don’t have any flutes. Proper feed ramp and Timed Extractor Cut. Nitride inside and out for corrosion and wear. Comes with the Thread Protector. You will not find a better barrel PERIOD

RCM HK STYLE 9MM ROLLER SET, STANDARD 8MM

The 8mm roller is the proper roller size for standard “zero” function. The correct 8mm roller is essential for proper head spacing & bolt gap. US Made, Per Set Price…

RCM HK STYLE 9MM EXTRACTOR SPRING

The RCM HK Style extractor spring will fit all of the 9mm HK variants. This part is US manufactured and made to the tightest of specifications and tolerances and will provide long service life . Get the gold standard without the gold price. These extractor springs perform and will last. The extractor spring is a high wear and replacement item and a must have for spares. This spring is the #1 repair & replacement item for the MP5 family of firearms.

Compatible with all:

HK MP5, HK 94
HK MP5K, SP89, SP5K
SW5 , BW5, CA94, BA89, V94’s
V89, Other HK MP5 custom builds or clones
Zenith, MKE, POF, DJ Getz, AA, Omega

RCM HK STYLE LOCKING PIECE #3/58 DEG. 5.56/.223

This is the proper locking piece for the HK33K and HK53 firearms as well as some HK51 builds. Made from ordnance grade steel and heat treated.

RCM HK STYLE USP .357 SIG CONVERSION BARREL 1/2-28 TPI

HK USP .40 Full Size To .357 Sig Conversion Barrel with 1/2-28 Thread

Each barrel is made from 4140R steel, heat treated and finished inside and out in the ultra-desirable nitride finish.

Traditional button rifled bore for use with jacketed and non-jacketed ammunition
4140 stress relieved & properly heat treated steel
Micro polished feed ramp
Machined to exact tolerances for proper fitment
Overall length 4.900″
Pictured with an 0-ring. There is no o-ring on these.
Comes with a thread protector
Finished inside and out in the “Nitride” process for enhanced service life
Not for use in the USP Compact models

SD HIGH TEMP SILICONE O-RING

This High Temp O-Ring is made from Silicone which can stand temps of 450 degrees. Will fit around the Cocking Tube without any trouble. Each HK MP5 SD O-Ring is the sealing gasket that seals the SD suppressor against the trunion on factory HK MP5 SD’s or factory correct conversions. This is a typical wear item as they do degrade & crack with time and use. If you want to have the best suppression and operation of the SD this is a MUST HAVE spare part. This is a replacement and wear part as suggested by HK. Get a few spares to have on hand.

MP5 SD Fits all MP5 SD models
MP5 SD conversions using the factory sealing ring

RCM HK 34 STYLE 9MM MP5 BARREL 12.700 LONG

These 9MM barrels are made from Mil-Spec 41V50 CHF blanks. Expertly profiled & chambered in the desirable 16 flute chamber profile. Each barrel is then finished with the ultra desirable “nitrided” process for ultra long life and the finest in corrosion resistance. This barrel is the first commercial style barrel available for the masses! Perfect for your MP5/HK34 custom style builds. As an added bonus each barrel counts as 1 US made compliant part. 100% US made and machined from the finest CHF barrel blanks in the US. When only the finest of barrels will do this is it!
For use in all MP5, 94 To HK34 style builds:

HK34
Custom HK34 Style, MP5 builds

Features:

12.7″ overall length
Threaded 1/2 X 28 with factory HK style splines
Front sight triple frame location for use with HK33/93 & G3K forearms
Features the attractive HK34 barrel contour, modeling & style
Finished in the ultra desirable “Nitride” process inside & out
Cold hammer forged from premium 41V50 CHF barrel blanks
True factory spec 16 flute chamber for the utmost in reliability
100% US made and simply the finest US made barrel available!

RCM HK STYLE MP5 PDW/K .40 F/A BOLT GROUP

Ideal to replace out of spec, worn or broken bolt groups or for that custom build. Each bolt group will work and fit on semi or full auto MP5K 40 & MP5K style 10mm firearms.

This is the finest US BCG available. Each bolt group comes complete, assembled ready to go:

Bolt head complete
#25 LO locking piece
Firing pin
Firing pin spring
Full auto bolt carrier (works in semi and F/A)
All parts use ordnance grade steel, heat treated to HK factory specifications. As an added bonus each bolt group counts as 2 US made compliant parts. This is simply the finest bolt group made. Made right here in the USA with all of the latest upgrades, material & improvements.