H&K Heckler & Koch
HK416 A5, MR556 A4 Gas Vent Screw - 2.3mm
- SKU:
- HKP-22054
- UPC:
- 642230270473
- MPN:
- 50236955, 236955
Description
H&K MR556 A4/416 A5 2.3mm Gas Vent Screw
German 2.3mm gas vent screw for MR556 A4. Provides more venting than the factory-installed 1.3mm screw.
Compatible With:
- HK MR556 A4
- HK416 A5
Additional Information
|
FIREARM MODEL(S):
|
, HK MR556 A4
, HK416 A5
|
|
CALIBER:
|
5.56 / .223
|
|
ORIGIN:
|
Germany
|
1 Review
-
Fine Tuning
Reduced recoil impulse plus best tune for my HK MR556 A4 16.5" barrel using 69 grain SMK and Surefire SOCOM-RC2 suppressor. It all matters. The 25mm (2.5) screw would cycle the bolt in "S" setting (with suppressor), but not consistently in "U" setting (w/o suppressor). Go figure. This 23mm (2.3) screw does cycle the bolt in "S" setting (with suppressor) AND "U" setting (w/o suppressor) while keeping gas to a minimum. YMMV. L-shaped allen key w/ T20 Torx head allows for easy removal and install @ torque spec (75 inch lbs.)
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