WTB XCR L Buried Gas Block

[Kiran04]

11" barrel, 5.56. What's the going rate on an XCR in this configuration?

[Sean K.]

11.5" barrel, 5.56. What's the going rate on an XCR in this configuration?

11.5" isn't going to be a buried gas block. It will be an exposed one if you go with a standard length upper with a standard gas system length.....and it'll be an 11" bbl most likely unless you go custom. 9" bbl in a standard length upper with a mini length gas system will give you a buried gas block. If you really want buried block on a 11.5....you can custom order with RobArms, but you'll need a mini length gas system and 11.5" bbl, in what I'd assume, is a standard length upper. Not sure RA will even do that combo and no idea on cost....but I'd bet wait time would be significant.

You could do a custom upper that you'd have to make yourself with a buried block if you went with a comp length upper, standard gas system and a 12" bbl....but you're going to have to cut the excess length on the comp upper, then have it re-anodized or cerakoted. It would look cool (almost did this on a 6.5G), but it would be a lot of added expense and work and you could fuck it up.

As for cost....go to Rob Arm's website for the MSRP. Contact Navalbeaver or Gramps96Kz here for pricing as well. I think factory pricing for the standard length uppers are in the $2100 range currently with a lengthy wait time of at least 12 weeks.

[Kiran04]

11.5" isn't going to be a buried gas block. It will be an exposed one if you go with a standard length upper with a standard gas system length.....and it'll be an 11" bbl most likely unless you go custom. 9" bbl in a standard length upper with a mini length gas system will give you a buried gas block. If you really want buried block on a 11.5....you can custom order with RobArms, but you'll need a mini length gas system and 11.5" bbl, in what I'd assume, is a standard length upper. Not sure RA will even do that combo and no idea on cost....but I'd bet wait time would be significant.

You could do a custom upper that you'd have to make yourself with a buried block if you went with a comp length upper, standard gas system and a 12" bbl....but you're going to have to cut the excess length on the comp upper, then have it re-anodized or cerakoted. It would look cool (almost did this on a 6.5G), but it would be a lot of added expense and work and you could fuck it up.

As for cost....go to Rob Arm's website for the MSRP. Contact Navalbeaver or Gramps96Kz here for pricing as well. I think factory pricing for the standard length uppers are in the $2100 range currently with a lengthy wait time of at least 12 weeks.

I just go by the options on the website. If you select the buried gas block version, the default barrel is 9" with options at 11, 12, 14.7, 16, and 18.6. 11 is the length I'd opt for if possible. 9 is far too short. Muzzle blast is massive.

[Sean K.]

I just go by the options on the website. If you select the buried gas block version, the default barrel is 9" with options at 11, 12, 14.7, 16, and 18.6. 11 is the length I'd opt for if possible. 9 is far too short. Muzzle blast is massive.

Meh...depends on personal preference. I have a 8.3125" in 5.56; it's blasty but not insane. I also have a 9" in x39....one of my favorites.

Mea culpa, I didn't realize they offered mini-length buried gas with standard length uppers with that many bbl options. Not sure why you'd bury the block on an 11.5" unless you just like the buried look better. Gas adjustment is much easier with the exposed block, but I do prefer the look of the buried ones.

[navalbeaver]

Mini gas position in a standard upper is going to be hard to adjust. You'll have to get to it from the front. I'm assuming they'd use the "blackout" gas system in a standard upper so you can reach the block for adjustment. That's going to be worse for pressure/dwell time, especially if you run a can. Not saying it won't run but I'll always take the longer gas system.

I'd go with the exposed block for the 11 but it's America so get whatever you can afford

[Sean K.]

Mini gas position in a standard upper is going to be hard to adjust. You'll have to get to it from the front. I'm assuming they'd use the "blackout" gas system in a standard upper so you can reach the block for adjustment. That's going to be worse for pressure/dwell time, especially if you run a can. Not saying it won't run but I'll always take the longer gas system.

I'd go with the exposed block for the 11 but it's America so get whatever you can afford

You can get at the dial with a bullet tip on the mini gas position in a standard upper. It's not easy like the exposed...but is doable. But you're right; comparatively, it's hard to adjust.

[Kiran04]

Mini gas position in a standard upper is going to be hard to adjust. You'll have to get to it from the front. I'm assuming they'd use the "blackout" gas system in a standard upper so you can reach the block for adjustment. That's going to be worse for pressure/dwell time, especially if you run a can. Not saying it won't run but I'll always take the longer gas system.

I'd go with the exposed block for the 11 but it's America so get whatever you can afford

In this market I'll take what I can get. Have one of these laying around with the 11" in any gas block configuration? If exposed works better, that's fine with me.

[Sean K.]

In this market I'll take what I can get. Have one of these laying around with the 11" in any gas block configuration? If exposed works better, that's fine with me.

I doubt anyone has much of anything XCR-wise laying around in terms of new stock. Might be someone looking to sell a used one though.

[fmunk]

Mini gas position in a standard upper is going to be hard to adjust. You'll have to get to it from the front. I'm assuming they'd use the "blackout" gas system in a standard upper so you can reach the block for adjustment. That's going to be worse for pressure/dwell time, especially if you run a can. Not saying it won't run but I'll always take the longer gas system.

I'd go with the exposed block for the 11 but it's America so get whatever you can afford

Yup. Pointless to have an adjustable gas system if you have to jump through hoops to get at it.