Re: AR Builds!
Posted: 18 Nov 2022 21:58
I've looked this up a time or two before but it's been a few years...
PSA is using midlength gas but putting the A frame at the rifle position. They claim timing is the reason for this (not enough dwell time) but other sources claim the tendency to use an oversized (or maybe over-oversized or OVERsized) gas port by some builders is the problem in producing a good build.
https://palmettostatearmory.com/psa-16- ... 49779.html
(added by edit)
PSA also makes a carbine length upper, (but they apparently offer about 3 to 1 mid length to carbine models at least for the uppers)
https://palmettostatearmory.com/psa-16- ... or-ch.html
Windham Weaponry (the old Bushmaster folks who started up after the non-compete with Remington/Cerebus expired.) is using a M4 profile but doesn't mention the gas length. They also marry their Dissipator upper with a carbine lower.
https://www.windhamweaponry.com/firearm ... ipator-m4/
I've seen mention of Del Ton using a rifle length gas system but I know the last ones Midway sold were listed as carbine gas systems.
LWRC makes a sightless mid length gas with a free float mid length handguard and a 16" barrel on a carbine lower that they call 'dissipator' by those specs I've probably built several on both carbine and rifle lowers but most of mine have at least had back up sights and some of them have had rifle length free float rails...
Then there's this: https://www.pewpewtactical.com/what-is- ... issipator/ but I've found the historical narratives to be somewhat less than reliable at times.
PSA is using midlength gas but putting the A frame at the rifle position. They claim timing is the reason for this (not enough dwell time) but other sources claim the tendency to use an oversized (or maybe over-oversized or OVERsized) gas port by some builders is the problem in producing a good build.
https://palmettostatearmory.com/psa-16- ... 49779.html
(added by edit)
PSA also makes a carbine length upper, (but they apparently offer about 3 to 1 mid length to carbine models at least for the uppers)
https://palmettostatearmory.com/psa-16- ... or-ch.html
Windham Weaponry (the old Bushmaster folks who started up after the non-compete with Remington/Cerebus expired.) is using a M4 profile but doesn't mention the gas length. They also marry their Dissipator upper with a carbine lower.
https://www.windhamweaponry.com/firearm ... ipator-m4/
I've seen mention of Del Ton using a rifle length gas system but I know the last ones Midway sold were listed as carbine gas systems.
LWRC makes a sightless mid length gas with a free float mid length handguard and a 16" barrel on a carbine lower that they call 'dissipator' by those specs I've probably built several on both carbine and rifle lowers but most of mine have at least had back up sights and some of them have had rifle length free float rails...
Then there's this: https://www.pewpewtactical.com/what-is- ... issipator/ but I've found the historical narratives to be somewhat less than reliable at times.