Modern Sporter - Build Discussions

[Valaden]

Almost done with my build.
F/A upper:
Faxon 20 inch gunner barrel, though I'm strongly considering having it cut down to 18.6.
Battle Arms Development, Lightweight Low Profile Titanium Gas Block
Radian Weapons, Aluminum Forward Assist
BCM 15 inches MCMR handguard
VG6 Epsilon muzzle
BCM BCG
Raptor charging handle
V7 Weapon Systems, Ultra Light AR15 Port Door
V7 dust cover titanium rod

Lower:
V7 Weapon Systems, Titanium AR15 Trigger/Hammer Pin Set
Primary Weapons Systems, Enhanced MilSpec Buffer Tube, GEN2 Ratchet Lock Endplate & Nut
Triggertech ajustable trigger
Radian ambi safety
KAC ambi mag release
JP SCSS
Magpul K2+
B5 Bravo

[Rayf01]

I spoke with IBI today about the 19" barrel. Sounds like the 0.936" gas block they have needs a hand guard internal clearance of at least 1.45 inches. Anyone recommend a lower profile block that will accommodate most other hand guards? Most guards don't seem to fit that size.

[PinaKaleada]

I spoke with IBI today about the 19" barrel. Sounds like the 0.936" gas block they have needs a hand guard internal clearance of at least 1.45 inches. Anyone recommend a lower profile block that will accommodate most other hand guards? Most guards don't seem to fit that size.

Consider a shorter handguard for an exposed gas block look. Not a bad style in my opinion.

[Bfranklin]

I spoke with IBI today about the 19" barrel. Sounds like the 0.936" gas block they have needs a hand guard internal clearance of at least 1.45 inches. Anyone recommend a lower profile block that will accommodate most other hand guards? Most guards don't seem to fit that size.

I have this barrel. Go with an F1 hyperlite, it clears it and looks decent.

[Rayf01]

I found a low profile 0.936 gas block by Odin Works that says it works in all of their hand guards including one that is 1.35" in diameter. I figured if I use that gas block it should work in just about any Hand guard with that diameter then as well. Like the Maple Ridge Armoury V1 M-LOK AR-15 which is 1.36".

I'm assuming anyways. Either that or I'll go with an Odin Works Hand Guard, there are some nice ones.

[rally guy]

I found a low profile 0.936 gas block by Odin Works that says it works in all of their hand guards including one that is 1.35" in diameter. I figured if I use that gas block it should work in just about any Hand guard with that diameter then as well. Like the Maple Ridge Armoury V1 M-LOK AR-15 which is 1.36".

I'm assuming anyways. Either that or I'll go with an Odin Works Hand Guard, there are some nice ones.

I don't know much about building AR but dont you need more clearance then that? As wen you shoot the barrel flexes and bends and you don't want it hitting the handgard.

[PinaKaleada]

I don't know much about building AR but dont you need more clearance then that? As wen you shoot the barrel flexes and bends and you don't want it hitting the handgard.

This is accurate. I’ve had marks from gas blocks printed on the inside of the handguard. I truly think exposed gas block might be your solution.

[Bfranklin]

The F1 P7M Hyperlite has 1.55" inside diameter. When I get home I will take a pic of it on the exact IBI barrel you are discussing. Plenty of clearance with a low pro gas block.

http s://f-1firearms.com/p7m-ar-15-hyper-lite-handguard/

[Rayf01]

I'd really like to use the MRA V1 hand guard, just need to see if the clearances will be too tight.

[PinaKaleada]

Is it me, or is the ejection port pivot hole too tight? After installing the metal rod, it will never come out. How do you guys remove it after installing?