Aloha everyone,
I've always wanted to add a 308 AR rifle to my collection so I thought to look here for some advice!
Here's my Bill of Materials:
JMT Tactical Polymer lower / Larue Tactical Straight Bow MBT trigger / Phase 5 Tactical Extended Bolt release / Radian 45* Safety selector / Magpul MIAD grip / Extended Mag Release
JP Rifles PSC-19 Side Charging upper / Radian Raptor LT Charging handle
Full Mass Bolt Carrier Group / JP Enhanced Bolt
Magpul Gen2 UBR stock / Heavy Buffers XH buffer / JP Polished Rifle length Spring (The spacer has been removed from the UBR Stock for the A5 length)
Criterion Hybrid Contour 18" 1/10 Barrel, Nitride finish, Mid length gas length / JP Adjustable Gas black / AAC Blackout Muzzle Break 51 Tooth
Juggernaut tactical 15" Free Float Barrel
I have a 16" Bear Creek Arms Barrel, yes I do but how can I say no to a $50 on sale stainless steel barrel with a guaranteed MOA accuracy? It does need to be crowned though.
This is also the first time I'm finishing a 80% and polymer lower receiver no less. I've already learned that you must be patient with sandpaper, putty knives and files with polymer lowers. Fitting parts is a bit of a pain especially when it comes to marrying the upper with the lower. Pretty much every cutout needed some material removed ever so slightly, that's where the putty knife and sand paper came into play. Folding the sandpaper over the edge gave me the tool I needed to make some room in tight spaces. You'll see in the pics where I had to sand in some spots. Not sure if there are other methods or tools out there ha ha ha.
My biggest issue with the lower is when the bolt locks back with a empty magazine, the magazine will not drop freely. Any other time the magazine will drop out but not with pressure behind the bolt stop which surprises me since the tolerance is so close. Pulling out the mag is a bit stiff so I wonder if anything can be done here, or is it common with the 308 AR Platform?
Right now I want to Cerakote my upper and I'm still waiting for my rail from Juggernaut Tactical. It seems like they're a bit slow and I'm wondering how the rail secures to the barrel nut / receiver. There's no manual I can look at and there's nothing on Youtube. Anyone have any experience with this? Will I need shims to clock the rail?
I've learned a lot by lurking in the forum so I wanted to thank you guys for sharing your experiences and knowledge and hopefully someone will learn from mine.
Thanks!
Aloha everyone, I've always wanted to add a 308 AR rifle to my collection so I thought to look here for some advice! Here's my Bill of Materials: JMT Tactical Polymer lower / Larue Tactical Straight Bow MBT trigger / Phase 5 Tactical Extended Bolt release / Radian 45* Safety selector / Magpul MIAD grip / Extended Mag Release JP Rifles PSC-19 Side Charging upper / Radian Raptor LT Charging handle Full Mass Bolt Carrier Group / JP Enhanced Bolt Magpul Gen2 UBR stock / Heavy Buffers XH buffer / JP Polished Rifle length Spring (The spacer has been removed from the UBR Stock for the A5 length) Criterion Hybrid Contour 18" 1/10 Barrel, Nitride finish, Mid length gas length / JP Adjustable Gas black / AAC Blackout Muzzle Break 51 Tooth Juggernaut tactical 15" Free Float Barrel I have a 16" Bear Creek Arms Barrel, yes I do but how can I say no to a $50 on sale stainless steel barrel with a guaranteed MOA accuracy? It does need to be crowned though. This is also the first time I'm finishing a 80% and polymer lower receiver no less. I've already learned that you must be patient with sandpaper, putty knives and files with polymer lowers. Fitting parts is a bit of a pain especially when it comes to marrying the upper with the lower. Pretty much every cutout needed some material removed ever so slightly, that's where the putty knife and sand paper came into play. Folding the sandpaper over the edge gave me the tool I needed to make some room in tight spaces. You'll see in the pics where I had to sand in some spots. Not sure if there are other methods or tools out there ha ha ha. My biggest issue with the lower is when the bolt locks back with a empty magazine, the magazine will not drop freely. Any other time the magazine will drop out but not with pressure behind the bolt stop which surprises me since the tolerance is so close. Pulling out the mag is a bit stiff so I wonder if anything can be done here, or is it common with the 308 AR Platform? Right now I want to Cerakote my upper and I'm still waiting for my rail from Juggernaut Tactical. It seems like they're a bit slow and I'm wondering how the rail secures to the barrel nut / receiver. There's no manual I can look at and there's nothing on Youtube. Anyone have any experience with this? Will I need shims to clock the rail? I've learned a lot by lurking in the forum so I wanted to thank you guys for sharing your experiences and knowledge and hopefully someone will learn from mine. Thanks!
