Author Topic: 7.5 inch AR Pistol Barrel  (Read 6031 times)

Offline scooter

  • Newbie
  • *
  • Posts: 45
7.5 inch AR Pistol Barrel
« on: April 19, 2010, 08:52:05 PM »
7.5 inch 5.56 AR Pistol Barrel $115.00.
1/9 twist 4140 chromoly barrel.
This is a new barrel  - I will try to get a picture up Tuesday eve.
PM if interested.
« Last Edit: April 20, 2010, 06:45:57 AM by scooter »

Offline VaderSpade

  • Full Member
  • ***
  • Posts: 217
Re: 7.5 inch AR Pistol Barrel
« Reply #1 on: April 19, 2010, 11:07:46 PM »
New? used?

Offline goober

  • Sr. Member
  • ****
  • Posts: 1628
    • goober on heatware
Re: 7.5 inch AR Pistol Barrel
« Reply #2 on: April 20, 2010, 09:44:04 AM »
i'll take it. PM sent.  :D
heatware username: goober

Offline scooter

  • Newbie
  • *
  • Posts: 45
Re: 7.5 inch AR Pistol Barrel
« Reply #3 on: April 20, 2010, 03:20:23 PM »
Goober - your set - will PM with info.

I have a few more if anyone else is interested.

Offline VaderSpade

  • Full Member
  • ***
  • Posts: 217
Re: 7.5 inch AR Pistol Barrel
« Reply #4 on: April 20, 2010, 05:23:50 PM »
I'm looking for a 10 1/2, but I'll take one to play with if you take GunPal, or PayPal.

Offline scooter

  • Newbie
  • *
  • Posts: 45
Re: 7.5 inch AR Pistol Barrel
« Reply #5 on: April 20, 2010, 10:42:12 PM »
OK guys 2 left.

Offline fishfactor

  • Full Member
  • ***
  • Posts: 151
Re: 7.5 inch AR Pistol Barrel
« Reply #6 on: April 21, 2010, 05:52:40 AM »
Does the gas system function OK on something this short?  It might be time for a pistol build.

I'm guessing HH buffer.

Offline scooter

  • Newbie
  • *
  • Posts: 45
Re: 7.5 inch AR Pistol Barrel
« Reply #7 on: April 21, 2010, 06:12:18 AM »
fishfactor -
7.5 is a fairly common size barrel I only had issues with 1 of mine (I have 3 AR Pistols).
It was easily fixed with a change in buffer spring.
Honestly there can be issues when doing a pistol build, there are several factors that
can cause problems with this short of a system.  All can be worked out though and
AR pistols are a heck of allot of fun and if you have a conceal carry nice to have in the car/truck.


Offline fishfactor

  • Full Member
  • ***
  • Posts: 151
Re: 7.5 inch AR Pistol Barrel
« Reply #8 on: April 21, 2010, 07:22:03 AM »
PM Sent.

You guys keep posting stuff like this that keeps costing me money.  At least I have a project now to keep me busy until goober posts his review on the KT 60% 1911.
« Last Edit: April 21, 2010, 12:16:20 PM by fishfactor »

Offline VaderSpade

  • Full Member
  • ***
  • Posts: 217
Re: 7.5 inch AR Pistol Barrel
« Reply #9 on: April 25, 2010, 04:16:56 PM »

Iíve had my pistol lower sitting on the shelf, and on hold for a while. My barrel arrived yesterday (thanks Scooter), and although I had no plans to get on this so fast I looked around and started scrounging parts. The float tube was one that had been on a couple of builds and had some unsightly holes up front, so I cut it (and the holes) off. The upper is from an old Colt SP1 with the large holes with bushings, I had no plans to use it but it worked great for this project. Still no gas tube, but here in CA were supposed to build our pistols as single shots so I locked a sled in and were ready for a test run.

Offline goober

  • Sr. Member
  • ****
  • Posts: 1628
    • goober on heatware
Re: 7.5 inch AR Pistol Barrel
« Reply #10 on: April 25, 2010, 05:19:13 PM »
cool Vader!  :D
let us know how the GSE buffer system works for ya once you get to semi- operation.
heatware username: goober

Offline VaderSpade

  • Full Member
  • ***
  • Posts: 217
Re: 7.5 inch AR Pistol Barrel
« Reply #11 on: April 25, 2010, 08:31:41 PM »
 This thing is a blast as a single shot; I canít wait until the gas tube comes in (on order from PK). It was a lot more accurate than I was ever lead to believe these short barrels could be. I was hitting a 12Ē target every time out to 40 yards.

Offline fishfactor

  • Full Member
  • ***
  • Posts: 151
Re: 7.5 inch AR Pistol Barrel
« Reply #12 on: May 10, 2010, 07:54:25 AM »
Finished the milling on my lower this weekend for this pistol build.  Just waiting on the Spikes .22 kit.  Should be a blast to shoot.

Offline VaderSpade

  • Full Member
  • ***
  • Posts: 217
Re: 7.5 inch AR Pistol Barrel
« Reply #13 on: May 20, 2010, 12:10:48 PM »
cool Vader!  :D
let us know how the GSE buffer system works for ya once you get to semi- operation.

 Well I gave this GSE buffer system every chance I could. I tried different bolts, different loads. I ran over 300 rounds through it as recommended, and Iíve come to the conclusion itís a piece of $#!^.
 It jams every other shot when itís not short stroking.
 
 I swapped it out with another pistol tube, and have not had one problem in over 100 rounds. Except that is the second tube wonít allow the bolt to catch when the magazine is empty. Itís just a ľĒ too short, but I can deal with that for now. It was a gift, and probably a prototype, so I wonít name names. But if anyone knows who might sell a short buffer let me know as that may solve my problem. 

 As for the pistol itís a blast, and check out this freestanding group @ 25 yards!!!

 That's a good barrel.

Offline scooter

  • Newbie
  • *
  • Posts: 45
Re: 7.5 inch AR Pistol Barrel
« Reply #14 on: May 20, 2010, 07:32:54 PM »
Thats some good shootin! ;D

Glad to see your havin fun with the barrel and the build.
Motivating me to find some time to finish mine - customers come first though.

I have some alternative caliber M4 Stainless Steel, bead blasted barrels w/bolts coming out I'll keep you posted.
A friend of mine did some testing on a chromoly 7.62x39 the other day and ran 1.5" groups at 100 with PMC Bronze ammo after barrel was broken in some.

5.45x39
7.62x39
6.8
6.5

Offline VaderSpade

  • Full Member
  • ***
  • Posts: 217
Re: 7.5 inch AR Pistol Barrel
« Reply #15 on: May 20, 2010, 08:45:13 PM »
I would pick up a 6.5 barrel. I just finished a 260 Rem. on a "banned member" lower. I could use up the bullets that don't work out in the .260  ;D

Offline scooter

  • Newbie
  • *
  • Posts: 45
Re: 7.5 inch AR Pistol Barrel
« Reply #16 on: May 21, 2010, 07:20:23 PM »
VS,
OK I was lost there for a second and had to do some reading on the remington .260 (actually a .264 / 6.5).
I have shot a few bolt style 260's but have never really looked at the round as I generally shoot 7MM Wby. as my small reach out and touch caliber.
Anyways we are holding on the 6.5's until commercial ammo is a little more available.  Wolf is doing a very big release (2 months late now) of 6.5
when it hits the market we will produce.