Seekins Precision / Primary Arms Exclusive 10.5" .223 Wylde Complete Upper - with 9" M-LOK MCSR Rail
This Seekins Precision upper has been built out specifically to Primary Arms specs to bring you one heck of a value. Featuring a quadruple quality checked, salt bath nitrided 10.5" .223 Wylde 41V50 Chrome Moly Vanadium barrel with 1:8 twist to ensure the greatest possible accuracy potential topped with Seekins' new Nest enclosed flash hider. The carbine length gas system is fed by a melonited gas tube for easy cleaning and easily tuneable thanks to the Seekins Precision Adjustable Low Profile Gas block, easily fitting beneath their 9" MCSR free float modular handguard cut for M-LOK accessories. The standard OEM M16/full auto pattern bolt carrier group, charging handle, and receiver round out the build for a complete, ready to-roll upper half just waiting for a good pistol or SBR lower to call home.
Ratings & Reviews
by Ben -
Works great! Dropped right in with no problem and with a little adjustment with the adjustable gas block, the build was up and running in no time. Would buy from Seekin's and Primary Arms again.
Very nice upper
by Frank -
First you should know the hex head screws are 3/32" and 5/64" and you will need a ball-end hex driver to adjust the one on the side of the block as it is partially blocked by the rail. I picked up a nice set for $9 from Amazon and they work fine.
<br> I only have fired about 50 rounds through it so far and since I was using it with a new lower at the same time I cannot say that the 2 failures are not the fault of either the lower or the magazine. Since I only had trouble with the one magazine of the 2 I took and it wouldn't lock back with the questionable magazine I am blaming those on the mag.
<br> Great value and I bought mine to use as a host for my Gem-Tech suppressor so the adjustable gas block was a selling point for me. This is an incredibly good price on this upper and thanks to Primary Arms for selling it.
<br> 5 stars as this is a great deal at this price.