Posted: 4/4/2026 3:25:31 PM EDT
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I'm looking for handguard options that are proven to fit my latest build. I'm hoping someone has experience with this configuration. Key parts: Barrel: 6mm ARC Proof Research stainless steel 22 inch barrel with rifle+1 gas system. This is the heavy version with 0.980" OD up to the gas journal and 0.875" at the gas journal. Gas Block: Superlative Arms 0.875" clamp-on adjustable gas block (NOT set screw version). Key dimensions: 1.044" width, 0.922" height above barrel centerline, 0.694" below barrel centerline, 1.616" overall height. Upper: BCM M4 forged upper receiver Handguard: Looking for something about 15" to cover the gas block with reasonable clearance. M-LOK is preferred, but I'm also open to the handguards with integrated ARCA rails. Handguard ID should be large enough to M-LOK screws don't hit the barrel. This will be a long range target gun, so I'm not worried about weight. Cost isn't a factor within reason. I appreciate any guidance. |
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currently OOS, but keep an eye on: https://www.sgtofarms.com/handguards https://maximdefense.com/product/md11-arca-handguard/ there are others, but I.D. specs werent found on sites: victorcompanyusa.com 51fiftyrifles.com iwi.us/product/arca-handguard-15-5 sonsoflibertygw.com/product/l89a-arca |
Proud Member of Team Ranstad
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Tennessee Squire
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NRA Member
Tennessee Squire
#PlasticPoniesForAll
Aimless = Suburban Pot Bellied Snow Chicken
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Thanks for your help. I've also found that many rail manufacturers don't list detailed internal dimensions. I've had my eye on the Sgt of Arms for a while now, but I've never seen them in stock. MTE Machining looks like another option, but not in stock either. I have emails to SA and to some of the rail manufacturers for more info. I was hoping that someone would have the same barrel / AGB combo and could provide a quick answer. |
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Originally Posted By spyderboy03: Just see you made a selection. The Geissele MK18 would be a good choice. Eurooptic has them in stock right now for a good add to cart price. It is was I have on my 18" 6 ARC with Griffin adjustable gas block. |
clearly I've gotten used to slim rails as the MK18 looks like a mansion inside compared to my MK14's and MK16's 