[m81 woodland]

I have a very early 5.56 XCR rifle that seems to be all stock - Serial Number in the mid 500s. This is what the Piston system looks like. Is it at all possible to convert this Rifle to the Type 2 'Short Stroke' system, and what components would be needed to do so?

 

[navalbeaver]

Gas block, op rod with piston, gas tube. You can use your current carrier, bolt and recoil assembly. Sometimes newer gas tubes and older uppers don't interface well. I've had some that were really tight.

I think I may have a type 2 gas tube available. Need to check which gas length.

 

[Vegasgunhand]

Mine was a early 900 serial number, I sent it back to Robinson for an update. It runs great!!!!

 

[m81 woodland]

Gas block, op rod with piston, gas tube. You can use your current carrier, bolt and recoil assembly. Sometimes newer gas tubes and older uppers don't interface well. I've had some that were really tight.

I think I may have a type 2 gas tube available. Need to check which gas length.

Might buy it from you if RobArms doesn't have the requisite parts available

Mine was a early 900 serial number, I sent it back to Robinson for an update. It runs great!!!!



View attachment 15772

How much did that cost?

 

[Vegasgunhand]

Might buy it from you if RobArms doesn't have the requisite parts available

How much did that cost?

It was like $800

 

[m81 woodland]

It was like $800

Not too bad. And this added everything required to change it to the Short Stroke type, right?

 

[Sean K.]

Not too bad. And this added everything required to change it to the Short Stroke type, right?

His is a long stroke Type 3. Finding Type 2 piston/tappet gas block for an XCR-L might be a trick even from RobArms. Not sure they even offer that configuration anymore. It's not on the current configurator on the site. You'll need to call RA direct or Nate (navalbeaver above) may be able to help you out if you really want short stroke (Type 2 gas system).

 

[m81 woodland]

His is a long stroke Type 3. Finding Type 2 piston/tappet gas block for an XCR-L might be a trick even from RobArms. Not sure they even offer that configuration anymore. It's not on the current configurator on the site. You'll need to call RA direct or Nate (navalbeaver above) may be able to help you out if you really want short stroke (Type 2 gas system).

Ah I see. Here's hoping Nate has em, or RobArms can still make the parts. I'd be more than willing to pay more for em.

 

[Sean K.]

Ah I see. Here's hoping Nate has em, or RobArms can still make the parts. I'd be more than willing to pay more for em.

Unfortunately, paying more for individual piece parts doesn't pay for a production run if RA doesn't have them. JFYI, owning all 3 systems, I don't see any real reason to prefer the Type 2 over the 3 (or really the Type 1 for that matter). The Type 2 hasn't proven to be any more accurate for me....but that's anecdotal as you know.

 

[m81 woodland]

Unfortunately, paying more for individual piece parts doesn't pay for a production run if RA doesn't have them. JFYI, owning all 3 systems, I don't see any real reason to prefer the Type 2 over the 3 (or really the Type 1 for that matter). The Type 2 hasn't proven to be any more accurate for me....but that's anecdotal as you know.

I'd just like the option, pretty much. Going to SBR mine and mount a can eventually so the further Weight Reduction and less recoil (not that it matters in the slightest in 5.56, but still) would be welcome. I noticed that the Type 0 gas rod is a hefty SOB

 

[navalbeaver]

I tried the type 2 on a 16" rifle and a 10" sbr, 5.56 and 5.45. It was the least over gassed of the current gas systems I've tried on the L but that may not hold true for other examples. The 0 seems to be the most restrictive. It wasn't enough of a difference from the other options to hold onto it and have another block/tube/piston to keep track of.

I think the 3 really is the sweet spot for the L. It won't save you much weight but you can get a piston head for your current op rod that'll work with the type 3 game Block.