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Riflespeed Gas Control .625in Assembly Block
As Low As $173.99 Save Up to 24%
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Zach's Review of Riflespeed Gas Control .625in Assembly Block

Put this on an M4 clone with a criterion barrel in it.
Followed the instructions, started at pos 1 with 5 rounds, failure to feed, pos 2 fully functional with last round bolt hold open.
Tossed the supressor on it & everything ran flawlessly for another 300 rounds.

Not sure if its actually doing anything for me or not lol.

Gonna throw an frt under it & see how many changes i have to make.
Pros:
  • ease of instalation
  • Adjustable gas settings
  • Eas of Maintenance
Cons:
  • Price $$$
Would Recommend: Yes
Was it helpful to you? Yes | No
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Last updated 2026-06-10 UTC.