What size gas block do I need?
- Factory MRP barrels use a 0.750" gas block and factory MWS barrels use a 0.875" gas block
- We recommend using a Superlative Arms or a Riflespeed adjustable gas block due to its compact size and symmetric shape.
- The type of gas tube you need depends on the gas block you use. 99% of gas blocks use a normal, bent style USGI gas tube. However there are some gas blocks, like the ones from Riflespeed, where you can retain the straight gas tube that comes on LMT barrels.
