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Firearms 22 Fat Rat Upper and all accessories

kombayotch

Gunny Sergeant
Full Member
Minuteman
Supporter
Sep 20, 2007
1,973
281
Ohio
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22 Fat Rat with 90 SMK, 22 Fat Rat with 95 SMK, 6 Dasher with 105 Hybrid

Precision AR upper built on a Seekins SP3R upper. It's in a wildcat called 22 Fat Rat, which is basically an Ackley'd 22 ARC. It 's designed to mimic 6 Dasher ballistics in an AR-15 Platform. Muzzle threaded 5/8-24. Rifle +2 gas system. 329 Rounds on the barrel. Also have a boltgun barrel threaded for an Impact 737R and modified mag, if interested. Build for PRS gas gun, but can no longer compete due to a back injury.

-Seekins IRMT Upper
-Seekins IRMT 15" Handguard
-JP Enhanced bolt carrier group
-26" PacNor 6.5T 3 groove stainless barrel
-SLR 0.936 gas block
-Just under 300 formed cases (from Lapua 6.5 Grendel)
-JGS Reamer
-PTG Go and No-GO gauges
-Impact 6mm Muzzle Brake
-Whidden 6mm Fat Rat die set with 2 intermediate forming bushings (need a 0.251 final bushing)
-Modified Lee seating and Factory Crimp dies
-Whidden shoulder gauge
-Modified case for Hornady bullet comparator
-Brownell's bore guide
-One 17rd. E-Lander 6.5 Grendel Magazine
-Spare Rifle +2 gas tube
-JoeBob bolt saver

27.5gr. of H4895 gets 88 ELD-M up to 2945 fps.
28gr. of H4895 gets 88 ELD-M up to 2990 fps.
Fireforming load is 25gr. of H4895 @ 2673 fps.

$1900 shipped

Would consider the following trades;
-Dillon RL-1100 or CP2000 set-up for 223/5.56
-Glock 21 Gen5 MOS
-USP45 Tactical
-Eotech XPS3
-Seekins MCSR 10" M-LOK Handguard
-Wilcox NV mounts
-Streamlight TLR-VIR II
-TBAC Take Down 22 Suppressor 100% certificate
 
Last edited:
Willing to part out the 22 Fat Rat specific stuff from common parts (receiver, handguard, muzzle brake, etc...) if someone just wants them. The 22 Fat Rat stuff needs to go first before I part out the other stuff.