SIG MCX .300 Blackout assault rifle builds SIG MCX .300 Blackout assault rifle
Assault rifles · base ergonomics 43 · base recoil 127/351 · compatible parts 453 types · data as of 2026-11-06
How to read — the three builds below are calculated from part stats. The numbers are the finished weapon ergonomics, vertical recoil, horizontal recoil, weight and parts cost, and the brackets show the difference from the default build. The builder at the bottom recalculates the stats as you swap parts slot by slot. Scopes are personal preference, so they are left out of the recommendations.
Comparison
| Build | Ergonomics | Vertical recoil | Horizontal recoil | Weight | Parts cost | Traders only (ergo / vertical recoil · cost) |
|---|---|---|---|---|---|---|
| Default build | 71.5 | 82 | 228 | 2.72kg | — | — |
| Lowest recoil | 42 (−29.5) | 59 (−23) | 164 (−64) | 3.74kg | 213,660₽ | 42 / 59 · 216,206₽ |
| Balanced | 85.5 (+14) | 74 (−8) | 205 (−23) | 3.1kg | 146,291₽ | 85.5 / 74 · 148,019₽ |
| Max ergonomics | 103.5 (+32) | 85 (+3) | 234 (+6) | 3.04kg | 102,809₽ | 103.5 / 85 · 105,525₽ |
Lowest recoil Ergonomics 42 · vertical recoil 59 · recoil −53.3%
The combination that cuts recoil the most. Ergonomics only breaks ties. Parts cost 213,660₽ (cheaper of flea market and traders; parts included with the gun count as 0₽).
| slots | Part | Ergonomics | Recoil | Where to buy | Price |
|---|---|---|---|---|---|
| Pistol Grip |  AR-15 Naroh Arms GRAL-S pistol grip | +5 | −1.5% | Skier LL3 | 18,738₽ |
| Magazine |  AR-15 5.56x45 HK PM Gen.2 STANAG 30-round magazine | −0.5 | 0 | Peacekeeper LL2 | 5,760₽ |
| Receiver |  MCX GEN1 .300 BLK upper receiver | +5 | 0 | Included | 0₽ |
| Scope |  Geissele Super Precision 30mm ring scope mount | +0.5 | 0 | Skier LL4 | 18,000₽ |
| Mount |  Geissele Super Precision top ring cap | +0.5 | 0 | Skier LL4 | 2,160₽ |
| Barrel |  MCX .300 BLK 16 inch barrel | −13 | −7.3% | Skier LL3 | 36,314₽ |
| Muzzle |  AR-10 Fortis RED Brake 7.62x51 muzzle brake | −6 | −12.5% | Mechanic LL4 | 25,375₽ |
| Gas Block |  MCX Cal-X Mid-Piston gas block | −6 | −3.5% | Skier LL3 | 6,480₽ |
| Handguard |  MCX GEN1 KeyMod 12 inch handguard | +17 | 0 | Skier LL3 | 14,400₽ |
| Front Sight |  Type 20 flip-up front sight | +0.5 | 0 | Flea Market | 2,200₽ |
| Foregrip |  Monstrum Tactical Vertical Fore Grip KeyMod | −2 | −3.5% | Flea Market | 18,800₽ |
| Rear Sight |  Type 20 flip-up rear sight | +0.5 | 0 | Peacekeeper LL3 | 3,365₽ |
| Stock |  SIG Sauer Folding Knuckle Stock Adapter | −2 | 0 | Peacekeeper LL3 | 6,089₽ |
| Stock |  AR-15 Magpul Enhanced Receiver Extension | −1.5 | −1% | Peacekeeper LL2 | 6,783₽ |
| Stock |  AR-15 Magpul PRS GEN3 stock (Black) | +1 | −24% | Peacekeeper LL3 · quest unlock | 49,196₽ |
| Ch. Handle |  MCX charging handle | 0 | 0 | Included | 0₽ |
Same build with trader cash purchases only.
Balanced Ergonomics 85.5 · vertical recoil 74 · recoil −41.5%
Keeps ergonomics at or above the default build (at least 60) while cutting recoil the most. Parts cost 146,291₽ (cheaper of flea market and traders; parts included with the gun count as 0₽).
| slots | Part | Ergonomics | Recoil | Where to buy | Price |
|---|---|---|---|---|---|
| Pistol Grip |  AR-15 Magpul MIAD pistol grip (FDE) | +6 | −1.2% | Peacekeeper LL2 | 11,027₽ |
| Magazine | AR-15 5.56x45 HK PM Gen.2 STANAG 30-round magazine | −0.5 | 0 | Peacekeeper LL2 | 5,760₽ |
| Receiver | MCX GEN1 .300 BLK upper receiver | +5 | 0 | Included | 0₽ |
| Scope |  Axion Kobra EKP-8-18 reflex sight | −2 | 0 | Jaeger LL1 | 16,061₽ |
| Tactical |  Axion Kobra sight shade | +3 | 0 | Flea Market | 135₽ |
| Barrel | MCX .300 BLK 16 inch barrel | −13 | −7.3% | Skier LL3 | 36,314₽ |
| Muzzle |  AR-10 Nordic Components Corvette 7.62x51 compensator | −3 | −11.5% | Mechanic LL4 | 26,280₽ |
| Gas Block | MCX Cal-X Mid-Piston gas block | −6 | −3.5% | Skier LL3 | 6,480₽ |
| Handguard | MCX GEN1 KeyMod 12 inch handguard | +17 | 0 | Skier LL3 | 14,400₽ |
| Front Sight | Type 20 flip-up front sight | +0.5 | 0 | Flea Market | 2,200₽ |
| Foregrip |  A3 Tactical MVF001 KeyMod vertical foregrip (Black) | +12 | 0 | Flea Market | 18,962₽ |
| Rear Sight | Type 20 flip-up rear sight | +0.5 | 0 | Peacekeeper LL3 | 3,365₽ |
| Stock |  SIG Sauer Collapsing/Telescoping Stock | +23 | −18% | Peacekeeper LL1 | 5,307₽ |
| Ch. Handle | MCX charging handle | 0 | 0 | Included | 0₽ |
Same build with trader cash purchases only.
Max ergonomics Ergonomics 103.5 · vertical recoil 85 · recoil −33.3%
Ergonomics as high as it goes (up to 100), with the least recoil among those builds. Parts cost 102,809₽ (cheaper of flea market and traders; parts included with the gun count as 0₽).
| slots | Part | Ergonomics | Recoil | Where to buy | Price |
|---|---|---|---|---|---|
| Pistol Grip | AR-15 Magpul MIAD pistol grip (FDE) | +6 | −1.2% | Peacekeeper LL2 | 11,027₽ |
| Magazine | AR-15 5.56x45 HK PM Gen.2 STANAG 30-round magazine | −0.5 | 0 | Peacekeeper LL2 | 5,760₽ |
| Receiver | MCX GEN1 .300 BLK upper receiver | +5 | 0 | Included | 0₽ |
| Scope | Axion Kobra EKP-8-18 reflex sight | −2 | 0 | Jaeger LL1 | 16,061₽ |
| Tactical | Axion Kobra sight shade | +3 | 0 | Flea Market | 135₽ |
| Barrel |  MCX .300 BLK 6.75 inch barrel | 0 | −3.1% | Flea Market | 22,222₽ |
| Muzzle |  SIG Sauer Taper-LOK 7.62x51/.300 BLK muzzle adapter | 0 | 0 | Included | 0₽ |
| Muzzle |  SIG Sauer Micro Brake 7.62x51 muzzle brake | −3 | −8% | Skier LL3 | 3,370₽ |
| Gas Block |  MCX gas block | −1 | −3% | Included | 0₽ |
| Handguard | MCX GEN1 KeyMod 12 inch handguard | +17 | 0 | Skier LL3 | 14,400₽ |
| Front Sight | Type 20 flip-up front sight | +0.5 | 0 | Flea Market | 2,200₽ |
| Foregrip | A3 Tactical MVF001 KeyMod vertical foregrip (Black) | +12 | 0 | Flea Market | 18,962₽ |
| Rear Sight | Type 20 flip-up rear sight | +0.5 | 0 | Peacekeeper LL3 | 3,365₽ |
| Stock | SIG Sauer Collapsing/Telescoping Stock | +23 | −18% | Peacekeeper LL1 | 5,307₽ |
| Ch. Handle | MCX charging handle | 0 | 0 | Included | 0₽ |
Same build with trader cash purchases only.
Build it yourself compatible parts per slot · stat calculator
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Shopping list
Parts in each dropdown are sorted by the current goal (the last build you picked). Changing a slot clears the slots under it and only required slots are refilled automatically. Your build is saved in this browser.
Slots on the weapon itself 5
- Pistol Grip 37 items · required
- Magazine 24 items
- Receiver 1 items · required
- Stock 10 items
- Ch. Handle 1 items · required
How it is calculated — ergonomics = weapon base + sum of part values; recoil = weapon base recoil × (1 + sum of part recoil modifiers). This formula matches the stats of all 163 default builds on tarkov.dev within ±1. Ammo recoil modifiers, weapon mastery and overweight penalties are not included (ammo: see the Ammo table). Ergonomics above 100 gets no extra credit in the recommendations. Conflicting parts are avoided, but some slot-position conflicts are missing from the data and may still be blocked in game. Prices are the flea market 24h average (PvP) and trader cash prices; barters are not included.
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