Does the FightLite DFX //M4 .223 work with the Geissele Automatics Reliability?

FightLite DFX AR-15/M16/M4 .223 Remington/5.56x45mm NATO 12.5in Upper Receiver Heavy Short-Stroke Gas Piston 1-7 Twist 1/2x28 Manganese

Upper Receiver

FightLite DFX //M4 .223 Remington/5.56x45mm NATO 12.5in

from $3995.00

Geissele Automatics Llc Reliability Enhancement Kit H3

Bolt Carrier Group

Geissele Automatics Reliability Enhancement KIT H3

from $455.00

FightLite Industries upper and Geissele bolt carrier group compatibility

Yes, they fit

The FightLite DFX //M4 .223 Remington/5.56x45mm NATO works with the Geissele Automatics Reliability Enhancement KIT. Our compatibility rules found no conflict between them.

No one has built this exact setup yet, but FightLite Industries uppers with Geissele bolt carrier groups are a common pairing.

Counted from real GunPartPicker builds: parts lists people put together while planning to buy.

Checked by the same rules the AR builder runs on every part you add: caliber, frame size, receiver pattern, thread pitch and gas length.

Fit is judged from the specs retailers list, which can be missing or wrong. Confirm with the manufacturer before you buy, and have a qualified gunsmith check any build before you fire it.

How often builders pair the FightLite Industries upper and Geissele bolt carrier group

Backed by thousands of qualified builds that have both an upper and a bolt carrier group.

Upper Receivers builders put under the Geissele Automatics Reliability

Share of builds with the Geissele Automatics Reliability and any upper

  • FightLite DFX //M4 .223

    Of upper picks
    0%
    Median paid
    $3995

  • Geissele Automatics Reliability

    Of bolt carrier group picks
    0.3%
    Median paid
    $368
How we count ⌄

These shares come from GunPartPicker's build data: real parts lists people put together while planning a purchase, not sales or surveys. A build counts a part only when it is the final pick for its slot, so parts that were swapped out never count. Fit never comes from these numbers; it comes from our compatibility rules alone.

Frequently built with the FightLite Industries upper and Geissele bolt carrier group

The part builders pick most often in each slot alongside these two, checked against both. Parts that conflict are left out.

Charging Handle

Trigger

Lower Receiver

Stock & Brace

Handguard

Optic

Gas Block

Pistol Grip

Light

FightLite DFX //M4 .223 vs Geissele Automatics: specs and prices

FightLite DFX //M4 .223Geissele Automatics
Best price$3995.00 at Optics Planet$455.00 at BattleHawk Armory
Stores0 of 1 in stock0 of 4 in stock
AssemblyCompleten/a
PlatformAR-15n/a
Caliber.223 Remingtonn/a
Receiver TypeM4n/a
Length12.5n/a
Cartridgen/a5.56 NATO
Stylen/aM16 Bolt Carrier
Finishn/aBlack

Both for $4450.00 at today's best prices.

Today's best prices and 90 day price history

Every store we track for each part, cheapest in stock first. Prices are checked through the day.

FightLite DFX //M4 .223 Remington/5.56x45mm NATO

Geissele Automatics Reliability Enhancement KIT

Price history, last 90 days

  • FightLite DFX //M4 .223: lowest $3995.00 on Jul 5, highest $3995.00 on Jul 5 over the last 90 days.
  • Geissele Automatics Reliability: lowest $444.60 on Jul 5, highest $494.00 on Jul 20 over the last 90 days.

Bolt Carrier Groups most paired with FightLite Industries uppers

The FightLite DFX //M4 .223 is not in enough builds yet, so these are the most picked next to any FightLite Industries upper. Only parts our rules say fit the FightLite DFX //M4 .223 are listed.

Upper Receivers frequently paired with the Geissele Automatics Reliability

Most picked next to it in real builds. Only parts our rules say fit the Geissele Automatics Reliability are listed.