Budget Hopsaw

$128.24 at Optics Planet · Out of stock

The Aero Precision M4E1 stripped upper is a forged 7075-T6 receiver with M4 feed ramps and a strengthened barrel extension interface for a tighter barrel fit. It is the standard, affordable foundation for a parts build and pairs cleanly with the Geissele barrel and Midwest rail.

$155.00 MSRP

The Aero M4E1 stripped lower keeps assembly simple with its threaded bolt catch pin and removes upper-lower wobble with a tension screw. The integrated trigger guard is stronger than a pinned guard, which matters on a rifle that will run hot and hard.

$328.50 at Optics Planet · In stock

The Geissele CHF is a 14.5-inch cold hammer forged 5.56 barrel with a chrome-lined bore, 1:7 twist, mid-length gas, and 1/2x28 threads. The chrome lining and CHF construction are what earn it a spot in a sustained-fire build; they endure the heat and round count that would wear a lesser barrel. At 14.5 inches it needs a pinned muzzle device to reach a non-NFA 16-inch length, or you register it as a short-barreled rifle.

$188.95 at Optics Planet · In stock

The Midwest Industries Combat Rail is a 6061-T6 M-LOK handguard with seven attachment faces, a full-length top rail, and a lifetime warranty, at a price well below premium rails. The 15-inch model runs 11.4 ounces and gives plenty of mounting room for a light and sling while free-floating the CHF barrel.

$223.99 at Optics Planet · In stock

The BCM bolt carrier group is a full-auto M16 profile with a shot-peened C158 bolt, chrome-lined interior, staked gas key, and an enhanced extractor, all HP/MPI tested. Its mass and QC keep the gun cycling reliably through the fast strings the forced reset selector enables.

$79.79 at Optics Planet · Out of stock

The BCM Gunfighter charging handle uses a Mod 4 medium extended latch and an internal design that routes force into the handle body instead of the roll pin, so it survives support-hand-only manipulation. It is the value benchmark for a durable single-side charging handle.

$82.95 MSRP

The ALG Defense ACT is an enhanced mil-spec single-stage trigger, roughly 6 pounds with the standard spring, from Geissele's sister company. Its nickel boron and nickel teflon coatings smooth the pull while the sear geometry stays mil-spec, which is exactly what the Atrius forced reset selector needs to cam against. It ships with both a full-power and a reduced-power spring. Keep the fire control mil-spec pattern; the selector cams only against mil-spec and Geissele super-safety-cut triggers, so cassette-style drop-in triggers are out.

$18.90 at Optics Planet · In stock

The Magpul MOE-K2 uses a steeper 17-degree angle that suits an aggressive modern stance and reduces wrist strain during long range strings. It is a value-priced polymer grip that accepts storage cores.

$169.99 at Optics Planet · In stock

The Atrius Development forced reset selector is the budget path to sustained fire. It is a forced reset selector, not a trigger: it drops into the safety-selector slot, adds a third Full-Semi mode, and uses a mechanically leveraged cam to reset a mil-spec trigger after each shot. It requires minor material removal from the trigger tail for the cam to engage, and it is right-hand only. It works with mil-spec and Geissele super-safety-cut triggers, which is why it pairs with the ALG ACT.

$59.95 at Optics Planet · In stock

The Magpul CTR is the value benchmark stock at 8.8 ounces, with a friction lock that eliminates the wobble common to basic M4 stocks. It keeps weight and cost down while giving a solid, repeatable shoulder position.

$127.95 at Optics Planet · In stock

The Magpul D-60 keeps 60 rounds ready in a compact drum with a ratcheting loading lever, so the forced reset selector's rate of fire is not interrupted by frequent reloads. It weighs 46 ounces loaded, the trade for the capacity.