MA GPT (Gas Tube Pin Tool)

Your Price: $35.00
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Part Number:MA-GPT

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GPT (Gas tube Pin Tool) is a jig tailor made for installing and removing the gas tube roll pin on an AR15/M16 low profile gas block.  Machined in 6061 aluminum and Type III hard coat anodized, GPT makes installing the gas tube pin on a low profile gas block painless.  GPT is designed to be stable and surefooted,  but it is no larger than it has to be, in order to retain a reasonable small footprint on the crowded workbench.

Most low profile gas blocks don't have flats, and are hard to hold steady without requiring 3 hands to install the diminutive gas tube roll pin.  GPT enables the user to install the gas tube roll pin, and remove it as well with ease.

We made its base thick and wide for stability, its base is rebated to allow the user to clamp it down in a vise.  Thoughtful touches can be found on the GPT, from the scalloped finger access recess to the soft, rounded corners and edges, even its green color has a purpose.  Most gas blocks are black, we wanted GPT to be anything but, as we found it more difficult to work on a black gas block that sits in a black jig. GPT's green color provides a pleasant contrast and makes the black gas block stand out.

With a small Neodymium magnet placed on the gas block, it's power enough to stand the gas tube roll pin can upright, perpendicular to the gas tube, above the gas tube pin.  With one hand holding the gas block steady in the GPT, one can start tapping on the gas tube roll pin to get it started.

GPT is a collaboration between Forward Controls Design & Modern Armory. Forward Controls Design's version can be found here:

Compatible with most gas blocks including Modern Armory, FCD GBF (Gas Block, Forward Controls), BCM, Rainier, VLTOR, Knight's Armament, SLR, or other low profile gas blocks based on the original Crane design.

Please measure your low profile gas block dimensions, as some are longer than others.  GPT is made for Crane Mk12 pattern low profile gas blocks, the length of which is 1".  GPT can be modified to accommodate longer gas blocks.

MAX gas block length: 1.00
MAX gas block height: 1.35

Known incompatible low profile gas blocks: Aero, BA Hanson, Luth AR, and DPMS, and adjustable gas blocks.
4 Stars
The product works very well for low profile standard gas blocks.
Did you find this helpful?  3 of 3 Found Helpful
Reviewed by:  from Blackfoot . on 1/23/2020
5 Stars
A must have!
This little tool is worth every penny. Makes installing and removing gas tubes a 20 second process.
Did you find this helpful?  1 of 1 Found Helpful
Reviewed by:  from Georgia. on 7/23/2020
5 Stars
A must have!
So this tool is a must for anyone building AR's. It make the gas tube installation very easy and fast. I'm probably going to buy a second one just to modify it take adjustable gas blocks. I highly recommend this bench block.
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Reviewed by:  from Kalispell, MT. on 3/13/2021
5 Stars
Worthwhile addition to toolbox
Very handy little jig for installing the gas tube roll pin. After using it a few times I would not want to go back to not having it. I've tried it with several different GB's and they have all fit. Would definitely purchase again.
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Reviewed by:  from United States. on 2/2/2021
5 Stars
You need this
This is one of those tools that once you buy you can't go back to not using it. Simple, effective, time-saving, and basically foolproof. 11/10 would buy again
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Reviewed by:  from WA. on 1/14/2021

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