DirtyDigz 1,793 Posted November 9, 2019 So I bought a PSA "dissipator" upper a while back and had the muzzle device pinned/bayo lug removed: https://palmettostatearmory.com/psa-16-mid-length-5-56-nato-1-7-nitride-dissipator-upper-black-no-bcg-or-ch-5165449779.html What options do I have for "drop-in" rifle-length handguards that don't require me to pull the barrel out of the upper in order to fit a custom barrel nut and will work with an A2 sight? I know about the magpul MOE; any others out there? Edit: Ideally either has a bottom picatinny rail or can mount a picatinny rail section - I have a picatinny-mounting forward grip I want to use with it. Quote Share this post Link to post Share on other sites
Scorpio64 5,120 Posted November 9, 2019 3 hours ago, DirtyDigz said: I know about the magpul MOE; any others out there? Yep, Magpul MLOK The upper is mid-length, are you looking to put a rifle length hand guard on that middi upper? Quote Share this post Link to post Share on other sites
fatty 241 Posted November 9, 2019 Well for full rail, there's the Midwest industries drop in and also the Troy MRF. Can't remember which one needed the triangle cap to be snipped off, but they're both solid. Just on the heavy side Quote Share this post Link to post Share on other sites
DirtyDigz 1,793 Posted November 9, 2019 41 minutes ago, Scorpio64 said: Yep, Magpul MLOK The upper is mid-length, are you looking to put a rifle length hand guard on that middi upper? Oh, my mistake, thought it was rifle length. No, just want a mid-length then. Quote Share this post Link to post Share on other sites
Scorpio64 5,120 Posted November 9, 2019 1 minute ago, DirtyDigz said: just want a mid-length then. If you swap out that sight tower with a low-pro gas block, your options open up. You pull the tower, ditch everything but the barrel nut and gas tube, attach the hand guard mounting hardware, attach hand guard, and viola, free floated for just another $50 and 15 minutes. If you are just looking to jazz it up a little, the magpul mlok hg is very good, plenty of mounting options. Quote Share this post Link to post Share on other sites
Contrvlr 17 Posted November 9, 2019 57 minutes ago, Scorpio64 said: Yep, Magpul MLOK The upper is mid-length, are you looking to put a rifle length hand guard on that middi upper? Read the barrel description. It's a mid length gas system with rifle length handguard. Quote Share this post Link to post Share on other sites
DirtyDigz 1,793 Posted November 10, 2019 15 minutes ago, Contrvlr said: Read the barrel description. It's a mid length gas system with rifle length handguard. Yeah, that's what I thought the first time, thanks: Quote Barrel is finished off with a pinned F-marked front sight post in the Rifle position with sling swivel, rifle length handguards, and an A2 flash hider. 23 minutes ago, Scorpio64 said: If you swap out that sight tower with a low-pro gas block, your options open up. You pull the tower, ditch everything but the barrel nut and gas tube, attach the hand guard mounting hardware, attach hand guard, and viola, free floated for just another $50 and 15 minutes. Thanks, but more work than I want to do at this point. Want to keep the FSB. I'll keep looking at my options for RIFLE LENGTH drop-in handguards. Quote Share this post Link to post Share on other sites
silverado427 10,555 Posted November 10, 2019 A dissy is a rifle length gas system with a 16" barrel. You could put m lok rails on the stock hand guard https://www.pewpewtactical.com/what-is-an-ar-15-dissipator/ Quote Share this post Link to post Share on other sites
Scorpio64 5,120 Posted November 10, 2019 Okay, after seeing this, I have a better understanding of what the deal is. PSA incorrectly states that the gas system is mid length. A rig designated as a "dissipator" has a rifle length gas system. You definitely need a HG compatible with rifle length if you are going with drop-in. 1 Quote Share this post Link to post Share on other sites
High Exposure 5,635 Posted November 10, 2019 A dissipator is a carbine or mid-length (preferred) gas system with the distance between the barrel nut and the FSB being rifle length. There is a low pro gas block under the handguards. There is another version similar to this called a Kino, which is a carbine gas system with the distance between the barrel nut and the FSB is mid-length on A 14.5” (or shorter - like 12.5”) barrel. 43 minutes ago, silverado427 said: A dissy is a rifle length gas system with a 16" barrel. You could put m lok rails on the stock hand guard https://www.pewpewtactical.com/what-is-an-ar-15-dissipator/ That would never work due to dwell time issues. 1 1 Quote Share this post Link to post Share on other sites
Old_Hunter 28 Posted November 10, 2019 Bushmaster’s original Dissipator was a rifle-length gas tube to the FSB and the barrel chopped to 16”. Short barrel, full-length sight radius. “Best of both world’s?” It should work fine depending on the size of the gas port hole drilled in the barrel. Quote Share this post Link to post Share on other sites
Displaced Texan 11,653 Posted November 10, 2019 If you are seeking a railed handguard, The KAS M5 RAS is a nice option. Little heavy though. Totally drop in. 1 Quote Share this post Link to post Share on other sites
High Exposure 5,635 Posted November 10, 2019 15 minutes ago, Old_Hunter said: Bushmaster’s original Dissipator was a rifle-length gas tube to the FSB and the barrel chopped to 16”. Short barrel, full-length sight radius. “Best of both world’s?” It should work fine depending on the size of the gas port hole drilled in the barrel. No. Bushmaster came out with the first civilian AR-15’s actually called the Dissipator which had shaved-down gas blocks at the normal carbine length and then a “dummy” A2 sight block up in front at the rifle position. 1 Quote Share this post Link to post Share on other sites
Displaced Texan 11,653 Posted November 10, 2019 Didn’t Del-Ton make one work with rifle length gas? Quote Share this post Link to post Share on other sites
JackDaWack 2,894 Posted November 10, 2019 I would personally just build another upper.. What was the point of buying a dissipator, just to turn it into your regular run of the mill upper? These things were always a novelty, run with carry handles and stocks... maybe a MOE hand guard wouldn't kill the novelty as much? Always loved the look of a "commando" m4, and these were just slightly longer versions, like the Kino and then the dissipator... With these "other firearms" now... I have a Kino on my short list...with a brace ofcourse. And thanks to @High Exposure cause i never knew it was called a kino.... Quote Share this post Link to post Share on other sites
silverado427 10,555 Posted November 10, 2019 3 hours ago, High Exposure said: A dissipator is a carbine or mid-length (preferred) gas system with the distance between the barrel nut and the FSB being rifle length. There is a low pro gas block under the handguards. There is another version similar to this called a Kino, which is a carbine gas system with the distance between the barrel nut and the FSB is mid-length on A 14.5” (or shorter - like 12.5”) barrel. That would never work due to dwell time issues. You learn something new everyday. Quote Share this post Link to post Share on other sites
silverado427 10,555 Posted November 10, 2019 9 hours ago, DirtyDigz said: So I bought a PSA "dissipator" upper a while back and had the muzzle device pinned/bayo lug removed: https://palmettostatearmory.com/psa-16-mid-length-5-56-nato-1-7-nitride-dissipator-upper-black-no-bcg-or-ch-5165449779.html What options do I have for "drop-in" rifle-length handguards that don't require me to pull the barrel out of the upper in order to fit a custom barrel nut and will work with an A2 sight? I know about the magpul MOE; any others out there? Edit: Ideally either has a bottom picatinny rail or can mount a picatinny rail section - I have a picatinny-mounting forward grip I want to use with it. Post a pic with the hand guard off. Quote Share this post Link to post Share on other sites
DirtyDigz 1,793 Posted November 10, 2019 31 minutes ago, silverado427 said: Post a pic with the hand guard off. Quote Share this post Link to post Share on other sites
DirtyDigz 1,793 Posted November 10, 2019 1 hour ago, JackDaWack said: ... What was the point of buying a dissipator, just to turn it into your regular run of the mill upper? ... Because I had a lower sitting around and got this upper for very cheap. I have no desire to make an "accurate recreation" of a historical dissipator. Quote Share this post Link to post Share on other sites
silverado427 10,555 Posted November 10, 2019 This is a great option. https://www.primaryarms.com/leapers-utg-pro-model-4-15-rifle-length-super-slim-drop-in-handguard-mtu003ss third review down Clean light weight rails 1 Quote Share this post Link to post Share on other sites
DirtyDigz 1,793 Posted November 10, 2019 26 minutes ago, silverado427 said: This is a great option. https://www.primaryarms.com/leapers-utg-pro-model-4-15-rifle-length-super-slim-drop-in-handguard-mtu003ss third review down Clean light weight rails Thanks for the recommendation. Went with this one instead: https://www.rainierarms.com/schmeisser-ar15-2-piece-drop-in-keymod-handguard-contract-overrun/ 1 Quote Share this post Link to post Share on other sites
Scorpio64 5,120 Posted November 10, 2019 9 hours ago, silverado427 said: Post a pic with the hand guard off. Pervert! 1 Quote Share this post Link to post Share on other sites