When getting into suppressors, you have two paths: build your own with Form 1 approval, or purchase a commercial suppressor with Form 4. Both require fingerprints, tax payment, and ATF approval—but the timelines, costs, and results differ significantly.
In This Guide
Quick Comparison Table
| Factor | Form 1 (Build) | Form 4 (Buy) |
|---|---|---|
| Approval Time (eFile) | 30-90 days | 4-8 months |
| Tax Stamp (2026) | $0 | $0 |
| Suppressor Cost | $200-$600 (kit + tube) | $400-$1,500+ |
| Fingerprints | EFT required for eFile | EFT required for eFile |
| Skill Required | Basic mechanical ability | None |
| Quality | Varies widely | Consistent, tested |
| Warranty | None | Lifetime (most brands) |
Form 1: Building Your Own Suppressor
Form 1 is the "Application to Make and Register a Firearm." It allows you to manufacture your own suppressor after receiving ATF approval.
How It Works
- Submit Form 1 with fingerprints and tax payment
- Wait for approval (30-90 days for eFile)
- Once approved, build your suppressor
- Engrave required information on the suppressor
Pros of Form 1
- Much faster approval: 30-90 days vs 4-12 months
- Lower total cost: Kits run $200-$600
- Customization: Build to your exact specifications
- Satisfaction: Pride in building your own
- Learning experience: Understand how suppressors work
Cons of Form 1
- No warranty: You're responsible for any issues
- Quality varies: Depends on your skills and materials
- Limited caliber options: Most kits are for common calibers
- Engraving required: Must engrave maker info
- Can't sell easily: Homemade suppressors have limited resale value
Form 4: Buying a Commercial Suppressor
Form 4 is the "Application for Tax Paid Transfer and Registration of Firearm." It's used when buying a suppressor from a dealer.
How It Works
- Purchase suppressor from dealer (pay for suppressor)
- Dealer initiates Form 4 with your fingerprints
- Wait for approval (4-12 months)
- Pick up your suppressor from dealer
Pros of Form 4
- Professional quality: Designed and tested by experts
- Lifetime warranty: Most manufacturers offer full coverage
- Proven performance: Reviews and data available
- Wide selection: Hundreds of models for every caliber
- Resale value: Commercial suppressors hold value
- No skill required: Just wait and pick it up
Cons of Form 4
- Much longer wait: 4-12 months is typical
- Higher cost: Quality suppressors start around $500-$700
- Suppressor sits at dealer: Paid for but can't take home
Fingerprint Requirements: Form 1 vs Form 4
Both forms require identical fingerprint submissions:
For Electronic Filing (Recommended)
- One EFT file per responsible person
- Same format for both Form 1 and Form 4
- Files can be reused across applications
For Paper Filing
- Two FD-258 cards per responsible person
- Must be mailed with application
- New cards needed for each application
Pro Tip: Get your EFT file once and use it for both Form 1 builds and Form 4 purchases. Planning to build one suppressor and buy another? Same fingerprints work for both.
Approval Times Compared (2026)
Form 1 Electronic (with EFT)
- Average: 60-90 days
- Fast approvals: 30-45 days
- Slow approvals: 90-120 days
Form 4 Electronic (with EFT)
- Average: 5-7 months
- Fast approvals: 4 months
- Slow approvals: 10-12 months
Why the Difference?
Form 1 applications are processed by a different branch than Form 4s, and the volume is lower. Form 4s involve dealer verification steps that add time. The result: Form 1 is typically 3-4x faster.
Total Cost Breakdown
Form 1 Build
- Tax stamp: $0 (2026)
- Solvent trap kit: $150-$400
- Titanium tube: $80-$200
- Fingerprints + EFT conversion: $20-$50
- Engraving: $30-$75
- Total: $280-$725
Form 4 Purchase (Mid-Range)
- Tax stamp: $0 (2026)
- Suppressor: $600-$900
- Fingerprints + EFT conversion: $20-$50
- Total: $620-$950
Form 4 Purchase (Premium)
- Tax stamp: $0 (2026)
- Suppressor: $1,000-$1,500
- Fingerprints + EFT conversion: $20-$50
- Total: $1,020-$1,550
Quality and Performance Comparison
Form 1 Suppressors
Quality depends entirely on your materials and assembly. Common issues with Form 1 builds:
- Baffle strikes from misalignment
- Lower sound reduction than commercial units
- Durability concerns with budget materials
- Limited caliber ratings
That said, a well-built Form 1 suppressor using quality components can perform admirably, especially for recreational use.
Commercial Suppressors
Manufacturers invest millions in R&D, use precision CNC machining, and test extensively. Benefits include:
- Optimized baffle design for maximum suppression
- Full-auto rated options
- Multi-caliber versatility
- Consistent quality control
- Warranty coverage for defects and damage
Which Should You Choose?
Choose Form 1 If:
- You want a suppressor ASAP (30-90 day wait)
- Budget is tight and you're handy
- You enjoy DIY projects
- You want a dedicated suppressor for a specific gun
- You understand you're sacrificing some performance
Choose Form 4 If:
- You want proven performance and reliability
- Warranty coverage matters to you
- You plan to shoot high volumes or full-auto
- You want multi-caliber versatility
- You don't mind waiting longer
- You might resell the suppressor later
Consider Both
Many enthusiasts do both: submit a Form 1 to get something quickly, then submit a Form 4 for a premium commercial suppressor. By the time your Form 4 approves, you've had months of enjoyment with your Form 1 build.
Ready for Either Path?
Whether you're building or buying, you need EFT fingerprints. Convert your FD-258 card once and use it for all your suppressor applications.
Get Your EFT File →