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BOLT Airsoft CNC Performance Aluminum Ported Piston w/ Full Steel Teeth (Model: Piston Only)

ID: 86140 (PT-BA-19-1)
M4GB19F-1 (Aluminum Piston)
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BOLT

$29.00

This item is currently Sold Out

MAP ProtectedExempt From Coupons
The manufacturer of this product enforces a strict minimum advertised price (MAP) policy which excludes this product from any additional discount coupon codes. This item, however, may qualify for free shipping.

Features

  • Lightweight aluminum piston set with removable steel rack gear
  • Precision CNC machining
  • Higher strength and durability compared to standard parts
Material: Aluminum Piston, Steel Teeth

Manufacturer: BOLT Airsoft

About BOLT

Bolt Airsoft excels in bringing realism to the Electric Airsoft rifle market through their patent pending Bolt Recoil Shock System (B.R.S.S. for short.) Their goal is to combine the advantages AEGs have such as performance, consistency, and reliability with the often sought after recoil impulse from a gas blowback system. This unique feature works by transferring the kinetic energy from the piston cycling to a weight system in the stock to generate the simulated recoil. Paired with high quality externals, Bolt Airsoft offers a line of excellent ready-to-play guns that also make for great starting platforms for project guns and upgrades.

3 Customer Reviews

(Write a review)

by austin w. on 08/04/2025
"This metal piston was ordered for a replacement on a B-4 B.R.S.S M4.

Installed perfectly as intended.

I would not recommend using this or any metal piston for standard non-B.R.S.S builds/systems though, metal on metal in the gearbox will scrap and wear things out if the metal piston does crack first.
by John S. on 01/18/2022
"Hey guys so used this for my new build and it works fantastic! Version 2 Gearbox
Here is the parts list, I mostly used guarder for everything except for a few things.
This compression set works great together!
SHS green nozzle
Guarder piston head, sp120 spring, cylinder head, advanced tappet plate, cylinder head
Bolt ported piston
by Dane A. on 01/21/2018
"This piston is amazing. For anyone with siegetek gears that tend to destroy pistons that are not full aluminum and steel, and can�t get their hands on a shs piston this is the next best thing. I have shot about 5000 rounds with this piston and absolutely not stripage on this. The only con about the piston is the black paint chips off, other than that it is awesome. I was shooting around 47 rps at 430 with .20 bbs and an m120 spring and a perfect air seal. I have siegetek 20.8 ratio gears with a gate Titan and a G&p Satan m180 motor and can�t complain about nothing.

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This item is currently Sold Out. Most out of stock items are restocked within 1-3 weeks. Some items may take longer. Please add this item to your wishlist to keep posted on its availability.

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