HK Roll Pin, Front Sight Base HK416 / A5 - Genuine HK #50975052
HK Roll Pin, Front Sight Base HK416 / A5 - Genuine HK #50975052
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Small part, critical function — lock down your HK front sight adaptor with OEM precision.
This is a genuine HK roll pin designed specifically for securing the front sight adaptor on HK416 A5 / MR556 platforms. It maintains correct seating and alignment of the adaptor, keeping your front-sight interface stable under recoil and repeated use.
• Genuine HK part #50975052 – made in Germany
• Correct spec for HK416 A5 / MR556 adaptor
• High-strength roll-pin for secure retention
• Ideal for rebuilds, replacements, or missing hardware
Add to your parts kit — keep your HK build factory-correct.
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Let customers speak for us
from 62 reviewsA hard to find item which you had in stock. Order placed in the am and shipped the same day. Quality parts and outstanding service!
Shipped same day and was exactly as described! Yall are awesome! Cant wait to buy more stuff!
Heavy duty and well machined.
This company is great! Marvin is an artist, orders sometimes will take a while but rest assured when you do get it, it will be perfect, so if youre a potential customer, be patient. It will be done
I enjoyed all the products so far. I plan to purchase more products in the future, keep up the good work!
I used this tool to build a Nefarious Arms A3 IAR barrel on an MR556 upper, and it was absolutely perfect for the job. It easily held under the required torque specs with zero barrel shift. More importantly, it eliminated any worry about shearing off the index pin, ensuring near-perfect timing after installation.Before this, I attempted to use a Midwest Industries Reaction Rod but found way too much play. The MR556 platform demands tight tolerances, and a generic reaction rod simply doesn't offer the precision needed. Because this tool is made specifically for these barrels, the fit is exact. If you are doing an MR556 build, this is the tool you need.