PSA 6.5 Grendel Upper Review: Sub-MOA for Under $500?

Hey Squat Squad, and welcome to Slav Guns. Gun owners looking for an accurate rifle on a budget already know you can get a sub-MOA bolt gun in something like 6.5 Creedmoor for under $500. But what if you want an accurate semi-auto AR-15 that can stretch toward a thousand yards without emptying the wallet? In this one I’m looking at the PSA 20″ rifle-length 6.5 Grendel complete upper — model 5165448709 — and asking a simple question: can you get that for around five hundred bucks?

Spoiler: with Hornady Black 123gr ELD Match and a ~4.5 lb Geissele on a Spikes lower, I squeezed out multiple sub-MOA three-shot groups at about 100 yards, including a 0.434″ group. Not bad for a complete upper that was under $500 when I filmed this.

Disclosure: The upper was provided by Palmetto State Armory for testing and evaluation. PSA did not see the video prior to publication.

Heads-up: I filmed this around July 2020 (model 5165448709 — PSA 20″ Rifle-Length 6.5 Grendel 1/8 Stainless Steel, 15″ Lightweight M-Lok Upper with BCG & CH). At filming the complete upper was just under $500; as of this write-up PSA still lists that SKU around $380. Check current availability and pricing before you buy.

Shop PSA directly: PSA 20″ 6.5 Grendel upper (5165448709). Gear I use: slav.li/amazon.

TL;DR

20″ 416R stainless barrel, 1:8 twist, rifle-length gas, adjustable gas block, 5/8×24 with a stock A2 flash hider.
Forged 7075-T6 upper, hardcoat anodized, forward assist + dust cover, 15″ lightweight M-Lok rail.
Complete with BCG & charging handle: 9310 bolt (shot-peened, gas key hardened to USGI), 8620 nitride carrier — Type 2 Grendel bolt face.
Ammo: Hornady Black 123gr ELD Match ~2500 fps from this 20″.
Groups at ~100 yd: multiple sub-MOA three-shots, best 0.434″; easy hits on 8″ steel at 330 yd even with a heavy trigger.
Filming-day price: just under $500 for the complete upper. Still a bargain if the SKU is around that range today.

Why 6.5 Grendel on an AR-15?

.223 / 5.56 was built around lighter bullets at higher velocity. Fine out to maybe 600 yards; past that the light projectiles start falling apart on energy and wind. You can load longer/heavier, but magazine length becomes the wall.

That’s why cartridges like 224 Valkyrie and 6.5 Grendel showed up — AR-15-sized platforms meant to stay effective further out. Valkyrie had a messy launch (twist/projectile chaos); Grendel is the more popular, fast-growing option. Think of it as a 7.62×39 case necked down to a more efficient 6.5 mm projectile that still feeds from an AR mag (typically ~20 rounds where you’d otherwise get 30 of .223). Capacity is the trade-off; performance at distance is the payoff.

I also covered a homebuilt Grendel path here: Building a 6.5 Grendel (Other Firearm).

What’s in the PSA complete upper

PSA offers 6.5 Grendel uppers in 12″, 18″, and 20″ with a few handguard options. I went 20″ with the lightweight rail — I already had a lower and preferred to pick my own stock.

Barrel: 20″ 416R stainless, 1:8 twist (good for heavier bullets past the usual 120–123gr factory loads), rifle-length gas, low-profile adjustable gas block (handy if you ever run suppressed).
Muzzle: 5/8×24, stock A2 flash hider — PSA saves money here and lets you pick a brake, flash hider, or can of your choice.
Receiver / rail: Mil-spec forged 7075-T6, hardcoat anodized, forward assist and dust cover, 15″ lightweight M-Lok free-float.
BCG: Ships complete. 9310 bolt, shot-peened, gas key hardened to USGI specs; 8620 carrier, nitride. Important: original Grendel used a Type 1 (7.62×39-style) bolt face; SAAMI-spec is Type 2 with a slightly different depth. Most modern Grendel is Type 2 — if you’re mixing barrel and bolt from different sources, match the type.

My test setup

Only modification to the upper itself: a Havoc Tactical deflector brake (stealth camo). It kicks brass toward ~2 o’clock instead of dumping it at 4, and more importantly for Grendel reloaders it keeps necks from getting beaten up on the ejector — brass necks looked clean and reload-ready.

Lower / furniture: Spikes lower, Geissele trigger (~4.5 lb on this one — clean wall, heavy break), Ergo grip, FAB RAPS stock, Long Shot Precision ABR bag rider, Atlas BT46 bipod.

Optic: Styrka S7 2.5-15×50 BDC SFP — solid glass for hunters or folks entering precision. Full review: Styrka S7 2.5-15×50 hunting scope review.

Mags: brand-new (at the time) polymer Amend2 10-round 6.5 Grendel mags — first polymer Grendel mags I had seen; they look like a 20-rounder but hold 10.

Range time

Goalposts going in: ~1.5 MOA = good deal; 1 MOA or better = great deal. Ammo was Hornady Black 123gr ELD Match. Velocity was right around 2500 fps.

First impressions: recoil is more than .223, nowhere near 7.62×39. Balance with the lightweight rail, RAPS, bipod, and bag rider felt excellent — center of gravity sits nicely over the bipod. Brass from the deflector brake landed clean; necks looked perfect for reloading.

The Geissele at ~4.5 lb was the limiting factor for precision. Three-shot groups were easy to get tight; five-shot groups were harder because of that heavy break. Still, I got multiple sub-MOA three-shot groups at about 100 yards, including one at 0.434″ (sub-0.5 MOA). And even as configured, hitting an 8″ steel at 330 yards was no problem.

Can you squat it? Yes — even with a suppressor on, the balance shifts a bit but it’s absolutely squat-able.

Bottom line

Palmetto State Armory’s 20″ 6.5 Grendel complete upper is a terrific value entry into AR-15 precision. Sub-MOA three-shots with factory Hornady Black, brass that survives for reloading with a decent deflector brake, and a complete package (barrel, rail, BCG, CH) that was under $500 when I shot it — and still lists in that ballpark.

The trigger on my Spikes lower was the weak link for five-shot groups. In the follow-up I planned to swap to something more precision-oriented (Jump Tech class) and push groups at 300+ yards. As it sits, this upper already delivered what a lot of people hope a budget Grendel build will do.

Gear I use: slav.li/amazon. Squat Squad perks: join the channel.

Keep squatting.

Running a PSA Grendel upper, or did you roll your own barrel/BCG?

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